THORLABS LDC200C series Operation Manual

Laser Diode Controller

LDC200C Series
Operation Manual

2015

Version:
Date:

6.3
02-Jul-2015

Copyright © 2015 Thorlabs

Contents

Foreword

3

1 General Information 4

2 Getting Started 8

102.4 First Operation

3 Operating Instruction 11

113.1 External Connections

113.1.1 Laser Diode Output

123.1.2 LD and PD polarities

133.1.3 Interlock

143.1.4 Analog Out

51.1 Laser Diode Protection Features

51.2 Safety

71.3 Ordering Codes and Accessories

82.1 Parts List

82.2 Preparation

92.3 Operating elements

143.2 Setting the Current Limit

143.3 Constant Current Mode (CC)

153.4 Constant Power Mode (CP)

163.5 Calibration of Optical Power Display

173.6 External Analog Modulation

173.7 Overtemperature Protection

183.8 Disabling the Beeper

183.9 Remote Operation

4 Maintenance and Service 20

204.1 Line Voltage Setting

214.2 Replacing Mains Fuses

224.3 Troubleshooting

5 Appendix 24

245.1 Technical Data

255.1.1 LDC200CV

265.1.2 LDC201CU

275.1.3 LDC202C

285.1.4 LDC205C

295.1.5 LDC210C

305.1.6 LDC220C

315.1.7 LDC240C

325.2 Declaration of Conformity

335.3 Warranty

345.4 Copyright and Exclusion of Reliability

355.5 Thorlabs 'End of Life' Policy (WEEE)

365.6 Thorlabs Worldwide Contacts

We aim to develop and produce the best solution for your application
in the field of optical measurement technique. To help us to live up to
your expectations and improve our products permanently we need
your ideas and suggestions. Therefore, please let us know about
possible criticism or ideas. We and our international partners are
looking forward to hearing from you.

Thorlabs GmbH

Warning

Sections marked by this symbol explain dangers that might result in
personal injury or death. Always read the associated information
carefully, before performing the indicated procedure.

Attention

Paragraphs preceeded by this symbol explain hazards that could
damage the instrument and the connected equipment or may cause
loss of data.

Note

This manual also contains "NOTES" and "HINTS" written in this form.

Please read these advices carefully!

© 2015 Thorlabs

3

LDC200C Series

1 General Information

The Thorlabs LDC200C Series Laser Diode Controllers are high accuracy precise injection
current controllers for laser diodes and LEDs. Together with a Thorlabs Temperature Controller
a stable operation of the connected laser diode can be achieved. The LDC200C Series
includes the following types:

· LDC200CV - designed for safe operation of VCSEL laser diodes.

· LDC201CU - ultra low noise current (<0.2µA RMS).

· LDC202C, LDC205C and LDC210C - enha nced compliance voltage (>10V) for use with

blue laser diodes.

· LDC240C - higher current (4A).

The LDC200C Series controllers are easy to operate via the operating elements on the front
panel. Operating parameters are shown on a 5-digit LED display. UP-DOWN keys allow to
select the parameter to be displayed.

After switching on a LDC200C Series laser diode controller, it remains in LASER OFF mode.
The laser current can be switched on/off using the appropriate key at the front panel.

Additionally the laser current can be switched by applying a TTL signal to the LD remote input
at the rear of the unit.

The laser and the photodiode are connected via a 9-pin D-SUB jack at the rear of the unit. The
output for the laser diode and the input for the photodiode are bipolar, thus all polarities of
commercial available laser diodes can be connected.

The injection current or the optical output power of the laser diode can be modulated applying a
modulation signal to the input at the rear of the unit.

A voltage proportional to the laser diode current is provided for monitoring purposes at an
analog control output at the rear.

If an error occurs or the limit for the laser current is reached, the corresponding LED lights up
and a short beep gives a warning.

For a low ripple and noise of the output current a mains filter is installed and the transformer is
shielded carefully.

The LDC200C Series controller are cooled by an internal fan, which protects the unit against
overheating in case of high environmental temperatures. With free air circulation a safe
operation of the unit is guaranteed up to 40 °C ambient temperature.

Warning

Do not obstruct the air ventilation slots in the housing!

Note

In order to prevent damages to the laser diode, it is recommended to mount the laser
into a suitable Thorlabs laser diode mount and connect it to the LDC200C Series using
the supplied Thorlabs CAB400 cable. This ensures the utmost protection of the laser
diode from damage by wrong connection.

© 2015 Thorlabs4

1 General Information

1.1 Laser Diode Protection Features

· Soft start function

The soft start fu nction protects the laser diode against undesired tran sie nts by smoothly
increasing the injection current after switching the lase r on. This current ramp last for abt.
200 msec.

· Adjustable limitation of laser current

An adjustable hardware limit for the laser current can be set using the 12 turn potentiometer
at the front panel. This protects the laser diode from unintentional laser current values.

· Contact protection of the laser diode (open circuit)

If the connection to the laser is interrupted during operation even for a very short time, the
output is switched off immediately and can be switched on manually only.

· Electronic short-circuit for the laser diode in LASER OFF mode

With the output switched off the laser diode is short-circuited electronically, thus the laser
diode is protected against accidental ESD and induced current transients.

· Line failure protection

The laser current is switched off immediately if a power failure or line interruption occurs. In
this case, same as after turning on the controller, the laser current remains switched off and
can be switched on manually only.

· Interlock

The interlock interface provides a number of several protection functions sim ultaneously.

- Safety lock to prevent unintentional use

- Cable disconnect or damage monitoring

- An e xterna l e mergency switch can be connected

- App licat io n of external automatic protection and a le rting equipment

- External LED to indicate “Laser ON”

The laser can only be switched on with the interlock input closed. If the interlock contact is
opened during operation (even for a very short time) the output is switched off immediately and

can be switched on manually only.

1.2 Safety

Attention

All statements regarding safety of operation and technical data in this instruction manual will
only apply when the unit is operated correctly as it was designed for.

All modules must only be operated with proper shielded connection cables.
Only with written consent from Thorlabs may changes to single components be carried out or

components not supplied by Thorlabs be used.
This precision device is only serviceable if properly packed into the complete original packaging

including the plastic foam sleeves. If necessary, ask for a replacement package.
Before applying power to your LDC200C Series controller, make sure that the protective

conductor of the 3 conductor mains power cord is correctly connected to the protective earth
contact of the socket outlet!

Improper grounding can cause electric shock with damages to your health or even death!
Also make sure that the line voltage setting of the fuse holder at the rear panel agrees with your

local supply and that the corresponding fuses are inserted. If not, please change the line
voltage setting (see section Line voltage setting ) and the mains fuses (see section Replacing

the mains fuses ).

21

20

The LDC200C Series controller must not be operated in explosion endangered environments!

© 2015 Thorlabs

5

LDC200C Series

Do not obstruct the air ventilation slots in housing!
Do not remove covers!
Refer servicing to qualified personnel!

Warning

Laser modules can deliver up to several 100mW of maybe even invisible laser radiation! When
operated incorrectly, this can cause severe damage to your eyes and health! Be sure to pay
strict attention to the safety recommendations of the appropriate laser safety class, as stated
for the used laser diode.

Attention

Use only duly shielded connection cables for laser, photodiode and control input/output
connections.

Mobile telephones, cellular phones or other radio transmitters must not be used within the
range of three meters of this unit since the electromagnetic field intensity may then exceed the
maximum allowed disturbance values according to IEC61326-1.

This product has been tested and found complying with the limits according to IEC 61326-1 for
using connection cables shorter than or equal to 3 meters (9.8 feet).

Attention

The following statement applies to the products covered in this manual, unless otherwise
specified herein. The statement for other products will appear in the accompanying
documentation.

Note: This equipment has been tested and found to comply with the limits for a Class B digital
device, pursuant to Part 15 of the FCC Rules and meets all requirements of the Canadian
Interference-Causing Equipment Standard ICES-003 for digital apparatus. These limits are
designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses, and can radiate radio frequency energy and, if not
installed and used in accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or television reception,
which can be determined by turning the equipment off and on, the user is encouraged to try to
correct the interference by one or more of the following measures:

· Reorient or relocate the receiving antenna.

· Increase the separation between the equipment and receiver.

· Connect the equipment into an outlet on a circuit different from that to which the receiver

is connected.

· Consult the dealer or an experienced radio/T.V. technician for help.

Thorlabs GmbH is not responsible for any radio television interference caused by modifications
of this equipment or the substitution or attachment of connecting cables and equipment other
than those specified by Thorlabs GmbH. The correction of interference caused by such
unauthorized modification, substitution or attachment will be the responsibility of the user.

The use of shielded I/O cables is required when connecting this equipment to any and all
optional peripheral or host devices. Failure to do so may violate FCC and ICES rules.

© 2015 Thorlabs6

1 General Information

1.3 Ordering Codes and Accessories

Ordering code Short description
LDC200CV Laser diode controller, current range 0 ... 20 mA / 6 V

LDC201CU Laser diode controller, current range 0 ... 100 mA / 5 V, Ultra Low Noise
LDC202C Laser diode controller, current range 0 ... 200 mA / 10 V
LDC205C Laser diode controller, current range 0 ... 500 mA / 10 V
LDC210C Laser diode controller, current range 0 ... 1 A / 10 V
LDC220C Laser diode controller, current range 0 ... 2 A / 4 V
LDC240C Laser diode controller, current range 0 ... 4 A / 5 V

Shielded cable:
CAB400 Cable to connect the LDC200C Series controller to a Thorlabs Laser Diode

Mount (included)

Laser diode mounts for different laser diode packages:
TCLDM9 Temperature controlled lase r d io de mount for 3- and 4-pin TO18-packages (9

mm CD, 5.6 mm CD)

LDM21 Miniature sized temperature controlled laser dio de mount for 3- and 4-pin

TO18-packages (9 mm CD, 5.6 m m CD)

LM14S2 laser diode mount for laser m odules in a 14-pin butterfly-package

(programmable pinning)

Please visit our homepage http://www.thorlabs.com for further informatio n.

© 2015 Thorlabs

7

LDC200C Series

2 Getting Started

2.1 Parts List

Inspect the shipping container for damage.
If the shipping container seems to be damaged, keep it until you have inspected the contents

and you have inspected the LDC200C Series controller mechanically and electrically.
Verify that you have received the following items within the package:

1. 1 LDC200C Series controller

2. 1 power cord, connector according to ordering country

3. 1 operation manual

4. 1 connection cable CAB400

2.2 Preparation

Prior to operate a LDC200C Series controller, check if the set line voltage matches with your
local power supply and if the appropriate fuses are inserted. (See sections Line Voltage Setting

20 21

and Replacing the Mains Fuses )

Connect the unit to the power line using the supplied cable. Turn the unit on by pressing the

line switch (F10) .

If required, the chassis ground can be connected to ground potential via the connector jack
(R5). The ground pin of the laser diode is internally connected to chassis ground.

9

© 2015 Thorlabs8

2.3 Operating elements

Front Panel

2 Getting Started

F1 - 5-digit LED display
F2 LED "mA" Current display in mA
F3 LED "mW" Power display in mW
F4 LED "OPEN" No laser diode connected, or Interlock open
F5 LED "LIMIT" Adjusted current limit reached
F6 LED "OTP" Overtemperature protection is active
F7 LED "LASER ON" Laser current is switched on
F8 Key "LASER ON" On / Off switch for the laser current
F9 - Knob for adjusting the current or power set value
F10 - Line switch (ON / OFF)
F11 LIM I Potentiometer for setting the current limit
F12 CAL Potentiometer for calibrating the power display
F13 LED "ILD" Display shows the laser current
F14 LED "PLD" Display shows the optical power
F15 LED "IPD" Display shows the photodiode current
F16 LED "ILIM" Display shows the current limit
F17 Key “DOWN” Select the parameter to be displayed
F18 Key “UP” Select the parameter to be displayed
F19 LED "AG" Selected laser polarity: anode grounded
F20 LED "CG" Selected laser polarity: cathode grounded
F21 LED "P" Constant power mode
F22 LED "I" Constant current mode
F23 Key "LD POL" Select laser polarity: anode grounded or cathode grounded
F24 Key "CONST" Select constant current mode or constant power mode
F25 PD RANGE Potentiometer for setting the photodiode current range

© 2015 Thorlabs

9

LDC200C Series

Rear Panel

R1 TTL input “LD REM”, 0 … +5 V
R2 Modulation input / analog control input "MOD IN", -10V … +10 V
R3 Analog monitoring output "CTL OUT", 0 … ±10V
R4 Fan
R5 4 mm banana jack for chassis ground
R6 Connector "LD OUT" for laser diode, photodiode, interlock, status LED
R7 Serial number of the unit
R8 Indicator / switch for line voltage (included in fuse holder)
R9 Mains connector and fuse holder

2.4 First Operation

Attention

Prior to switching on your LDC200C Series controller, please make sure that the line voltage

setting corresponds to your mains voltage! Mismatching may lead to damage of the

controller!
Turn the unit on by pressing the line switch (F10).
After switching on the unit, the LED display (F1) and a LED, indicating the selected

measurement value (F13 ... F16), light up, otherwise please check the line voltage and the

mains fuses .

20

20

21

By using the keys (F17) and (F18) the displayed measurement value can be selected.
A LDC200C Series controller is immediately ready to use after turning on. The rated accuracy

is reached, however, after a warming-up time of approx. 10 minutes.

© 2015 Thorlabs10

3 Operating Instruction

Pin #

Connection

Interlock (open circuit monitoring, status display)

1

interlock and status LASER ON / OFF

5

ground for pin 1

Laser Diode

7

laser diode cathode (in case of polarity "anode grounded" - AG)

8

laser diode anode (in case of polarity "cathode grounded" - CG)

3

laser diode ground

Photodiode

2

photodiode cathode

4

photodiode anode

3 Operating Instruction

3.1 External Connections

Prior to switch on the LDC200C Series controller, all required external connections must be
made properly. Please read the following sections carefully.

3.1.1 Laser Diode Output

The Thorlabs LDC200C Series controller can drive all laser diodes depending on the model up
to a maximum current of 4 A.

If a Thorlabs laser mount is used, just connect the 9-pin D-Sub jack "LD OUT" (R6) of
LDC200C Series controller to the 9-pin plug "LD DRIVER" of the Laser Diode Mount using the
supplied shielded cable CAB400.

If a Thorlabs laser mount TCLDM9 or LDM21 is used, in addition the polarity of laser diode and
photodiode must be set using the two slide switches at the laser mount. Please refer to the
individual operation manual of the laser diode mount.

If other laser diode fixtures are used, connect the laser diode and - if provided - the photodiode
using shielded cables to "LD OUT" (R6) according to the pin assignment as shown below:

Pin assignment of the "LD OUT" jack (female, rear panel view)

10

Note

Do not connect the laser diode between pin 7 and 8! The correct connection must be:

· for laser diode "AG": cath ode to pin 7, anode to pin 3, pin 8 - op en

· for laser diode "CG": anode to pin 8, cathode to pin 3, pin 7 - open.

© 2015 Thorlabs

11

LDC200C Series

3.1.2 LD and PD polarities

Connect laser and photodiode to the LDC200C Series controller as shown below.
The ground connection of the laser diode (pin 3) can be connected to the anode of the

photodiode (pin 4), or to the cathode of the photodiode (pin 2). This connection should be as
close as possible to the laser diode to avoid measurement errors.

If the selected polarity (key "LD POL" F23 ) and the pin connection of the laser diode do not

9

match, no current is flowing through the laser diode.

The laser diode is always sourced with respect to ground. Compared to a floating ground
scheme, the advantages of this operation mode are higher safety for the laser diode, better
stability of the laser current and less introduced interferences.

Prior to turning on the laser current, the correct polarity of the laser diode must be selected:

· Make sure the laser is switched off (key “LASER ON” F8).

· Select the required polarity by pressing the key "LD POL" (F23).

· For laser diodes with a built-in monitor diode the common pin of laser diode and

photodiode is the ground pin.

· The selected polarity of the output is indicated by the LED "AG" (F19) or "CG" (F20).

If the laser diode was connected correctly (see above) but the polarity of the laser diode was
selected wrong with the key “LD POL” (F23), an “OPEN” error will be indicated (LED “OPEN”
F4).

After pressing "LASER ON" (F8) the LED "OPEN" (F4) extinguishes and the output can be
switched on by pressing "LASER ON" (F8) again.

Biasing the photodiode

If the photodiode shall be operated with bias voltage, a battery can be connected in series to
the photodiode.

If the photodiode is of AG polarity, connect the positive terminal of the battery to the cathode of
the photodiode, and the negative terminal of the battery to pin 2.

If the photodiode is of CG polarity, connect the negative terminal of the battery to the anode of
the photodiode, and the positive terminal of the battery to pin 4.

© 2015 Thorlabs12

3 Operating Instruction

Attention

A wrong polarity of the battery may destroy the photodiod e due to a forward current flowing
through it!

3.1.3 Interlock

Pin 1 and pin 5 of the "LD OUT" jack (R6) are the interface of the interlock circuit.

11

The interlock output represents a current source, while the voltage across the external circuit,
connected to pin 1 and 5, is being observed. As soon as this voltage rises above a certain
threshold (~2.5V), the external circuit is considered as "open", the laser current output is
disabled and the LED "OPEN" (F4) lights up .

9

Pin 1 and pin 5 must be connected externally by a short cut wire, by a circuit (total resistance
<430 W) or by a LED (anode to pin 1, cathode to pin 5, connect in parallel resistor R=1 kW). A

connected LED lights up when the laser current is switched on (LASER ON).

Note

Do not use blue LED due to their high forward voltage
Thorlabs Laser Diode Mounts use the interlock current for indication "LD ON". When using a

Thorlabs TCLDM9 or LM14S2 laser diode mount, interlock functionality can be easily used for
emergency switch-off of the laser by connecting an opening contact to the jack located on the
laser mount. For details, please refer to the appropriate laser diode mount manual.

© 2015 Thorlabs

13

LDC200C Series

3.1.4 Analog Out

The output "CTL OUT" (R3) delivers a DC voltage, proportional to the actual laser current.

10

The output voltage ranges from:

· 0 …+10 V with cathode grounded

· 0 … -10 V with anode grounded.

When connecting a load avoid ground loops. The load resistance should be >10 kW. The
conversion coefficient for this output can be calculated to:

where I

k

CTL OUT

is the max. output current for the given controller.

max

= 10V/I

max

[V/mA]

Example:
For an LDC202C with a max. output current of 200mA the conversion coefficient k

CTL OUT

is

equal to 0.05 V/mA.

3.2 Setting the Current Limit

Prior to switch on the laser diode, always set an appropriate injection current limit to protect the
laser diode from destruction:

· Switch on the unit - button "LINE" (F10).

· Make sure the laser current is switched off

· Select parameter "ILIM" (key F17 or F18).

· Use a screwdriver to set the desired current with the potentiom eter "LIM I" (F11).

Note

The current limit can be displayed at any time by selecting the parameter "ILIM"
If the laser current reaches it's limit during operation, the LED "LIMIT" (F5) lights up and a short

beep alerts about that. The current limit can also be adjusted when the output is switched on.
Avoid any adjustments when the LED "LIMIT" (F5) lights up.

3.3 Constant Current Mode (CC)

· Switch on the LDC2xxC.

· Make sure, that the current limit "ILIM" is adjusted properly .

· Make sure that the correct laser diode polarity is set.

· Connect the laser diode .

12

12

· Select the display "ILD" using the keys (F17) or (F18).

· Turn the adjust knob (F9) com pletely counter clockwise.

· Select constant current mode (“I”) by pressing the key “CONST” (F24) until LED "I" (F22)

lights up.

· Switch on the output by pressing the key "LASER ON" (F8). The LED "LASER ON" (F7)
lights up, the output is activated and t he current slowly rises (about 1 s) to the value set with
knob (F9).

14

Note

The current output can b e switched on only if the jack "LD OUT" (R6) is connected correctly

© 2015 Thorlabs14

3 Operating Instruction

The display shows the injection current "ILD".
With the adjust knob (F8) the laser current can be set continuously between 0 mA and the

selected current limit "ILIM".
ð If the injection current "ILD" reaches the set current limit "ILIM" during operation, the LED

"LIMIT" (F5) lights up, a short alert beep is heard, and the laser current is limited to the value
of the current limit "ILIM". In this case, noise a nd ripple do not longer correspond to the
specifications for normal operation. However exceeding the set current limit "ILIM" is
impossible.

ð If the connection to the laser diode is interrupted during operation, the laser diode current is

switched off automatically. LED "LASER ON" (F7) extinguishes, LED "OPEN" (F4) lights up
and a short beep is heard.

ð If the output is switched on while the interlock is closed and there is no laser diode

connected, at first the LED "LASER ON" (F7) lights up and the output is switched on. Then
the LDC2xxC recognizes the missing laser diode and switches the output off. The LED
"LASER ON" (F7) extinguishes and the LED "OPEN" (F4) lights up. Connect the laser and
press "LASER ON" (F8) - the LED "OPEN" (F4) extinguishes and the output switches on.

ð If a photodiode is connected, the display can be set to show the photodiode current "IPD" or

the optical power "PLD" by pressing the key (F17) or (F18).

The laser current can be modulated via the connector "MOD IN" (R2).

17

3.4 Constant Power Mode (CP)

If the laser includes a photodiode (also known as monitor diode), the laser can be operated
also in constant power mode. In contrast to the constant current mode, here the photodiode
current is kept constant by controlling the laser injection current.

· Start operating the LDC2xxC in constant current mod e (refer to chapter 3.4)

· Select the display "IPD" with the key (F17) or (F18).

· Check whether an appropriate photo diode current "IPD" is available. A photodiode current o f

at least the minimum control current must be available for a stable operation of the power
control:

5 µA for LDC200CV,
25 µA for LDC201CU, LDC202C, LDC205C,
50 µA for LDC210C, LDC220C, L DC240C.

Note

If the sign of the photodiode current "IPD" is negative, the photodiode must be reversed.

· Switch off the laser current by pressing the key "LASER ON" (F8) .

· Select constant power mode (“P”) by pressing the key “CONST” (F24) until LED "P" (F21)

lights up.

· Set the adjust knob (F9) comple t ely counter clockwise.

· Switch on the output by pressing "LASER ON" (F8). T he LED "LASER ON" (F7) lights up,

the output is activated and the current slowly increases (about 1 s) to the set value.

· The photodiode current "IPD" can be set using (F9) and with that the optical power of the
laser diode increases until the laser current "ILD" reaches the selected current limit "ILIM".

ð If the desired photodiode current "IPD" cannot be set with a sufficient accuracy (F9), the

range of the knob (F9) can be fitted to the current range of the connected photodiode using
the potentiometer "PD RANGE" (F25) - see below.

ð If no photodiode is connected or the polarity of the photodiode is set wrong, the laser current
© 2015 Thorlabs

15

LDC200C Series

"ILD" increases to the limit "ILIM" after the output is switched on.

ð If the connection to the photodiode is interrupted in constant power mode, the laser current

"ILD" increases to the set current limit "ILIM".

ð If the injection current "ILD" is limited by the selected current limit "ILIM", ripple and noise do

not longer correspond to the specifications for normal operation. However, the set maximum
current "ILIM" cannot be exceeded.

ð If the connection to the laser diode is interrupted during operation, the output is switched off

automatically. LED "LASER ON" (F7) extinguishes, LED "OPEN" (F4) lights up and a short
beep is heard.

ð If the output is switched on while the interlock is closed and there is no laser diode

connected, at first the LED "LASER ON" (F7) lights up and the output switches on. Then the
LDC2xxC recognizes the missing laser diode, switches the output off, the LED "LASER
ON" (F7) extinguishes and the LED "OPEN" (F4) lights up. Connect the laser, then press
"LASER ON" (F8) - the LED "OPEN" (F4) extinguishes and the laser diode current output
switches.

ð The laser current can be modulated via the connector "MOD IN" (R3) - see section External

Analog Modulation .

17

Changing the "IPD" setting range

With potentiometer "PD RANGE" (F25) the full scale of the adjustment knob (F9) can be set in
order to ease the setting of the operating point in constant power mode even with low
photodiode current. The photodiode current range depends on the type of the LDC2xxC
controller:

· LDC200CV: 0.6 mA to 2 mA

· LDC201CU, LDC202C, LDC205C: 3 mA to 10 mA

· LDC210C, LDC220C, LDC240C: 6 mA to 20 mA

· Turn the potentiome t er "PD RANGE" (F25) completely counter clockwise.

· Turn the adjust knob (F9) com pletely counter clockwise.

· Select constant power mode “P” (key “CONST” F24), conn ect the laser diode and the

photodiode and switch on the la ser current by pressing the key “LASER ON” (F8).

· Set the desired photodiode current with the knob (F9).

If the desired operating point cannot be reached even if the knob (F9) is turned completely
clockwise (i.e. IPD > 0.6 mA), turn the potentiometer "PD RANGE" (F25) clockwise until the
desired setting range has been reached.

Note

A change of the "PD RANGE" (F25) leads to a change of the power set value in CP mode. In
constant current mode the potentiometer "PD RANGE" is without function.

3.5 Calibration of Optical Power Display

Additionally to the photodiode current "IPD", the optical power of the laser diode can be
displayed. To achieve a correct optical power display, a calibration (potentiometer "CAL" - F12)
must be carried out:

ð Select constant current mode “I” - key “CONST” (F24).
ð With the knob (F8), set the laser current "ILD" to an operating point for which the optical

output power of the laser diode is known, e.g. from the data sheet of the laser diode. You

© 2015 Thorlabs16

3 Operating Instruction

may also find this operating point by displaying the monitor current "IPD" (F15). A more
accurate way is to measure the laser power using an optical power meter.

ð Select the display "PLD" (F14) - keys (F17) or (F18).
ð Turn the potentiometer "CAL" (F12) completely counter clockwise.
ð Select the range at which the displayed power is least higher than the actual optical power:
ð Press the key “CONST” (F24). While holding it, press the key “Down” (F17). With every

keystroke, the decimal point of the display moves to the left. Pressing the key “Up” (F18), the
decimal point moves to the right. After reaching the highest range, the decimal point jumps
back to the left-most position.

ð Calibrate the display "PLD" to the value of the actual optical power by adjusting the

potentiometer "CAL" (F12) clockwise.

3.6 External Analog Modulation

To generate a time dependent injection current "ILD" or photodiode current "IPD", these settings
can be modulated via an independent ground-symmetric modulation input "MOD IN" (R2).

Maximum allowed input voltage is –10 V … +10 V, input resistance is >10 kW.
"ILD" and "IPD" are calculated as:

ILD = ILD SET + ILD MAX * UMOD / 10 V (in constant current mode)
or IPD = IPD SET + IPD MAX * UMOD / 10 V (in constant power mode)
with:

ILD MAX: Maximum laser current (e.g. 500 mA for L DC205C)
IPD MAX: Max. photodiode current (e.g. 10 mA for LDC205C; see Control

Ranges in “Technical Data ”)

24

ILD SET or IPD SET: value set with knob (F9)
UMOD: voltage at input "MOD IN" (R2)

Start operation in constant current or constant power mode (refer to chapter 3.4 or 3.5) and
adjust the desired set value with the knob (F9).

Connect the modulation source to the jack "MOD IN" (R2). Avoid ground loops when
connecting the function generator.

The laser diode current "ILD" can be monitored at the analog output "CTL OUT" (R3) .

14

If the injection current "ILD" reaches the current limit "ILIM" in operation, the LED "LIMIT" (F5)
lights up, a short beep is heard, and the laser current is limited to the value of the current limit
"ILIM". In this case, ripple and noise do no longer correspond to the specifications for normal
operation. However the set maximum current "ILIM" cannot be exceeded.

3.7 Overtemperature Protection

The LDC200C Series controllers come with an internal over-temperature protection. If the
internal heat sink is overheated, the output of the controller is disabled automatically. The LED
"OTP" (F6) lights up and a short beep is heard. The laser diode current is switched off
immediately. Pressing the key "LASER ON" (F8) has no effect in this case.

After the internal heat sink's temperature decreased for about 10°C, the LED "OTP" (F6)
extinguishes and the laser current output can be switched on again.

© 2015 Thorlabs

17

LDC200C Series

3.8 Disabling the Beeper

If audible signals are unwanted, the beeper can be disabled in this way:

· Press and hold the key “UP” (F18).

· Press the key “Down” (F17). Now the beeper state is displayed:

· “Sd.On” - Sound ON

· “Sd.OFF” - Sound OFF

To change the beeper state, hold the key “UP” pressed and toggle the beeper state by pressing
"DOWN" key.

3.9 Remote Operation

Although the LDC200C Series Controllers do not provide a standard computer interface, a
limited remote operation is possible using the TTL input or the analog inputs and outputs.

The following control or read out functions are available:

LD REM

This digital input allows to switch on/off the laser independent of the key “LASER ON”. A rising
edge at this input switches the laser on (if being in off state), a falling edge switches the laser
off (if being in on state). The threshold voltages are TTL compatible and feature hysteresis.

When using the “LD REM” input, the key “LASER ON” remains fully functional.

Interlock

If a relay contact or an open collector transistor is inserted into the interlock line (refer to section
"Interlock "), the output can be switched off remotely at any time.

13

Note

The interlock is usable only for switching off. After the interlock path was interrupted, the
LDC200C Series Controller can be switched on again only manually, provided the Interlock is
closed.

Setting the laser diode current

The analog modulation input “MOD IN” input (R2) is DC coupled; the input voltage ranges from

-10V to + 10V. The input resistance of the input “MOD IN” is >10 kW.
A voltage applied to this input is converted to a current value, which is then superposed to the

LD set value, adjusted with the rotary knob F9. The conversion coefficient depends on the max.
nominal output current of the controller and can be calculated to

k

where I

= I

MOD

is the max. output current for the given controller.

max

/10V [mA/V]

max

Example:
For a LDC202C with a max. output current of 200mA the conversion coefficient k

is equal to

MOD

20mA/V.
If the adjusting knob (F9) is set to it's left stop position, corresponding to a zero injection

current, the laser diode set current value can be controlled externally by an analog DC voltage
of (0...+10) V applied to the “MOD IN” input (R2).

If knob F9 is at its right stop position (corresponding to the max. injection current), a DC voltage
of (-10…0) V can be used to decrease the injection current.

© 2015 Thorlabs18

3 Operating Instruction

Note

The laser current output must be switched on, otherwise a current control via MOD IN is
impossible.

Monitoring the laser current

The output "CTL OUT" (R3) delivers a DC voltage, proportional to the actual laser current.

10

The output voltage ranges from:

· 0 …+10 V with cathode grounded

· 0 … -10 V with anode grounded.

Load resistance should be >10 kW. The conversion coefficient for this output is the
multiplicative inverse of k

MOD

:

k

CTL OUT

= 10V/I

max

[V/mA]

Note

All operating elements of the LDC2xxC are active at any time. For remote operation, make sure
that the manual settings are n ot changed during operation.

© 2015 Thorlabs

19

LDC200C Series

4 Maintenance and Service

Protect the LDC200C Series from adverse weather conditions. The LDC200C Series is not
water resistant.

Attention

To avoid damage to the instrument, do not expose it to spray, liquids or solvents!

The unit does not need a regular maintenance by the user. If necessary the unit and the display
can be cleaned with a cloth dampened with water. A mild 75% Isopropyl Alcohol solution can
be used for more efficient cleaning.

LDC200C Series Controllers do not contain any modules and/or components that could be
repaired by the user himself. If a malfunction occurs, please contact Thorlabs for return
instructions.

Do not remove covers!

36

To guarantee the specifications given in section Technical Data over a long period it is

24

recommended to have the unit factory calibrated every two years.

4.1 Line Voltage Setting

The laser diode controller LDC2xxC operates at fixed line voltages of

100 V +15% / -10% ( 90 V … 115 V)
115 V +15% / -10% (104 V … 132 V)
230 V +15% / -10% (207 V … 264 V)

line frequency 50 … 60 Hz.
The line voltage setting can be changed from the rear without opening the unit.

1. Turn off the controller and disconnect the mains cable.

2. The fuse holder (R10) is located below the 3-pole power
connector of the mains jack (R9). Release the fuse holder
by pressing its plastic retainers with the aid of a small
screwdriver. The retainers are located on the right and left
side of the holder and must be pressed towards the center.

3. Unplug the white line voltage switch/indicator (R8,
containing the left fuse) from the fuse holder (R10), rotate it
until the appropriate voltage marking (100V, 115V, or
230V) is on target for the cutout (R12) of the fuse holder,
and plug it back into the fuse holder. Press in the fuse
holder until locked on both sides. The appropriate line

voltage marking must be visible in the cutout (R12) of the fuse holder.

Attention

If you have changed to or from 230 V, also change the mains fuses to the correct value given in
section Replacing Mains Fuses .

21

© 2015 Thorlabs20

4 Maintenance and Service

100 V

500 mA, time-lag, 250V

T0.5A250V

115 V

500 mA, time-lag, 250V

T0.5A250V

230 V

250 mA, time-lag, 250V

T0.25A250V

100 V

800 mA, time-lag, 250V

T0.8A250V

115 V

800 mA, time-lag, 250V

T0.8A250V

230 V

400 mA, time-lag, 250V

T0.4A250V

4.2 Replacing Mains Fuses

The two power input fuses are externally accessible. If they blew due to line distortions,
incorrect line voltage or other causes, they can be replaced from the rear without opening the
unit.

Attention

To avoid risk of fire only the appropriate fuses for the corresponding line voltage must be used

1. Turn off the LDC2xxC and disconnect the mains cable.

2. The fuse holder (R10) is located below the 3-pole power
connector of the mains jack (R9). Release the fuse holder by
pressing its plastic retainers using a small screwdriver. The
retainers are located on the right and left side of the holder
and must be pressed towards the center.

3. Replace the defective fuses (R11) and press in the fuse
holder until locked on both sides. Take care to maintain the
correct rotation of the white line voltage indicator / switch (R8)
which contains the left fuse and is plugged into the fuse
holder. The appropriate line voltage marking must be visible in
the cutout (R12) of the fuse holder.

Fuse types

LDC200VC, LDC201CU, LDC202C, LDC205C, LDC210C, and LDC220C:

LDC240C:

All fuses must meet IEC specification 60127-2/III, time characteristic: time-lag (T), 250V AC,
size 5 x 20 mm.

© 2015 Thorlabs

21

LDC200C Series

4.3 Troubleshooting

In case that your LDC200C Series Controller shows malfunction please check the following
items:

q Unit does not work at all (no display at the front ):

o LDC2xxC connected properly to the mains?

§ Check the power cord and the line voltage setting

o LDC2xxC turned on?

§ Turn on your LDC200C Series Controller (button "LINE" F10).

20

o Check the fuses at the rear panel.

21

§ If blown, replace the fuses with the correct type.

q The desired laser output power cannot be achieved

o Is the interlock closed?

§ Check the connection of interlock pins of the connector jack.

13

o Is the laser output turned on ("LASER ON" button)?

§ Change th e setting from “OFF” to “ON”. The LED “ON” on the front pa nel of the
mainframe must light up.

o Is the current limit ILIM set to 0?

§ Adjust the hardware limit I LIM (potentiome t er on the front panel) to an

14 14

appropriate value.

o Is the laser diode installed properly?

§ Check the connection cable.

o Is the polarity of the laser diode se t correctly?

§ If not change the polarity of the diode or select on the LDC2xxC the opposite polarity

12

.

o Is the photodiode conn ected properly?

§ Check the connection cable.

o Is the photodiode poled correctly?

§ If in constant power mode the displayed photodiode current is negative, the polarity
of the photodiode must be reverted.

o Are you using a bias voltage with the photodiode in photo cu rren t mode?

12

§ Change th e polarity of the diode for photo elem ent mode or change the polarity of the
bias voltage source.

o Is the desired output power set correctly?

§ Check the optical power display calibration

16

§ Adjust the desired output power PLD using the tuning knob.

© 2015 Thorlabs22

4 Maintenance and Service

q The unit switches on, but display shows error message (e.g., “Err06”)

o This indicates a malfunction of the LDC200C Series Controller.

§ In such case, the controller needs to be returned to Thorlabs for maintenance.
Please contact Thorlabs with the information of the error code number and the

36

serial number of your LDC200C Series Controller in order to receive the RMA
(Return Material Authorization) instructions accordingly.

If you don’t find the error source by means of the trouble shooting list please contact Thorlabs

36

for advise and/or return instructions

© 2015 Thorlabs

23

LDC200C Series

General Data

Safety Features

Interlock

Laser Current Limit

Soft Start

Short Circuit when Laser off

Open Circuit Detection

Overtemperature Protection

Display

LED, 5 Digits

Connector for Laser, Photodiode, Interlock &
Laser On Signal

9-pin D-Sub Jack

Connectors for Control Input / Output

BNC

Chassis Ground Connector

4mm Banana Jack

Line Voltage

100 V
115 V +15% / –10%
230 V

Mains Supply Overvoltage

Category II (Cat II)

Line Frequency

50 to 60 Hz

Operating Temperature Range 1)

0°C to +40 °C

Storage Temperature Range

-40°C to +70 °C

Relative Humidity

Max. 80% up to 31 °C, decreasing to 50% at 40 °C

Pollution Degree (Indoor Use only)

2

Operation Altitude

<2000 m

Warm-up Time for Rated Accuracy

10 min

Dimensions (W x H x D)

w/o Operating Elements
with Operating Elements

146 x 66 x 290 mm³
146 x 77 x 320 mm³

5 Appendix

5.1 Technical Data

Common Technical Data

1

) non-condensing

All technical data are valid at 23 ± 5°C and 45 ± 15% rel. humidity (non condensing)

© 2015 Thorlabs24

5.1.1 LDC200CV

Current Control (Constant Current Mode)

Control Range

0 to ±20 mA

Compliance Voltage

>6 V

Resolution

1.0 µA

Accuracy

±20 µA

Noise Without Ripple (10Hz to 10MHz, rms, typ.)

<1.0 µA

Ripple (50/60Hz, rms, typ.)

<0.5 µA

Transients (typ.)

<10 µA

Drift, 24hours
(typ., 0-10Hz, at constant ambient temperature)

<1 µA

Temperature Coefficient

<50 ppm/°C

Current Limit

Setting Range

0 to >20 mA

Resolution

1 µA

Accuracy

± 50 µA

Power Control (Constant Power Mode)

Photo Current Control Range

5 µA to 2 mA

Photo Current Resolution

0.1 µA

Photo Current Accuracy

±2 µA

Analog Modulation Input

Input Resistance

10 kW

Small Signal 3dB Bandwidth, CC Mode

DC to 100 kHz

Modulation Coefficient, CC Mode

2 mA/V ±5%

Modulation Coefficient, CP Mode

0.2 mA/V ±5%

Laser Current Monitor Output

Load Resistance

>10 kW

Transmission Coefficient

500 V/A ±5%

General data

Maximum Power Consumption

20 VA

Weight

<3.1 kg

5 Appendix

All technical data are valid at 23 ± 5°C and 45 ±15% humidity

© 2015 Thorlabs

25

LDC200C Series

Current Control (Constant Current Mode)

Control Range

0 to ±100 mA

Compliance Voltage

>5 V

Resolution

10 µA

Accuracy

±50 µA

Noise Without Ripple (10Hz to 10MHz, rms, typ.)

<0.2 µA

Ripple (50/60Hz, rms, typ.)

<0.5 µA

Transients (typ.)

<10 µA

Drift, 24hours
(typ., 0-10Hz, at constant ambient temperature)

<2 µA

Temperature Coefficient

<50 ppm/°C

Current Limit

Setting Range

0 to >100 mA

Resolution

10 µA

Accuracy

± 200 µA

Power Control (Constant Power Mode)

Photo Current Control Range

25 µA to 10 mA

Photo Current Resolution

1 µA

Photo Current Accuracy

±10 µA

Analog Modulation Input

Input Resistance

10 kW

Small Signal 3dB Bandwidth, CC Mode

DC to 0.2 kHz

Modulation Coefficient, CC Mode

10 mA/V ±5%

Modulation Coefficient, CP Mode

1 mA/V ±5%

Laser Current Monitor Output

Load Resistance

>10 kW

Transmission Coefficient

100 V/A ±5%

General data

Maximum Power Consumption

20 VA

Weight

<3.1 kg

5.1.2 LDC201CU

All technical data are valid at 23 ± 5°C and 45 ±15% humidity

© 2015 Thorlabs26

5.1.3 LDC202C

Current Control (Constant Current Mode)

Control Range

0 to ±200 mA

Compliance Voltage

>10 V

Resolution

10 µA

Accuracy

±100 µA

Noise Without Ripple (10Hz to 10MHz, rms, typ.)

<1.5 µA

Ripple (50/60Hz, rms, typ.)

<1.5 µA

Transients (typ.)

<0.2 mA

Drift, 24hours
(typ., 0-10Hz, at constant ambient temperature)

<3 µA

Temperature Coefficient

<50 ppm/°C

Current Limit

Setting Range

0 to >200 mA

Resolution

10 µA

Accuracy

± 500 µA

Power Control (Constant Power Mode)

Photo Current Control Range

25 µA to 10 mA

Photo Current Resolution

1 µA

Photo Current Accuracy

±10 µA

Analog Modulation Input

Input Resistance

10 kW

Small Signal 3dB Bandwidth, CC Mode

DC to 250 kHz

Modulation Coefficient, CC Mode

20 mA/V ±5%

Modulation Coefficient, CP Mode

1 mA/V ±5%

Laser Current Monitor Output

Load Resistance

>10 kW

Transmission Coefficient

50 V/A ±5%

General data

Maximum Power Consumption

25 VA

Weight

<3.1 kg

5 Appendix

All technical data are valid at 23 ± 5°C and 45 ±15% humidity

© 2015 Thorlabs

27

LDC200C Series

Current Control (Constant Current Mode)

Control Range

0 to ±500 mA

Compliance Voltage

>10 V

Resolution

10 µA

Accuracy

±0.5 mA

Noise Without Ripple (10Hz to 10MHz, rms, typ.)

< 3 µA

Ripple (50/60Hz, rms, typ.)

< 2 µA

Transients (typ.)

< 0.5 mA

Drift, 24hours
(typ., 0-10Hz, at constant ambient temperature)

<10 µA

Temperature Coefficient

<50 ppm/°C

Current Limit

Setting Range

0 to >500 mA

Resolution

10 µA

Accuracy

±1.5 mA

Power Control (Constant Power Mode)

Photo Current Control Range

25 µA to 10 mA

Photo Current Resolution

1 µA

Photo Current Accuracy

±10 µA

Analog Modulation Input

Input Resistance

10 kW

Small Signal 3dB Bandwidth, CC Mode

DC to 150 kHz

Modulation Coefficient, CC Mode

50 mA/V ±5%

Modulation Coefficient, CP Mode

1 mA/V ±5%

Laser Current Monitor Output

Load Resistance

>10 kW

Transmission Coefficient

20 V/A ±5%

General data

Maximum Power Consumption

30 VA

Weight

<3.1 kg

5.1.4 LDC205C

All technical data are valid at 23 ± 5°C and 45 ±15% humidity

© 2015 Thorlabs28

5.1.5 LDC210C

Current Control (Constant Current Mode)

Control Range

0 to ±1 A

Compliance Voltage

>10 V

Resolution

100 µA

Accuracy

±1.0 mA

Noise Without Ripple (10Hz to 10MHz, rms, typ.)

<5 µA

Ripple (50/60Hz, rms, typ.)

<3 µA

Transients (typ.)

<1 mA

Drift, 24hours
(typ., 0-10Hz, at constant ambient temperature)

<20 µA

Temperature Coefficient

<50 ppm/°C

Current Limit

Setting Range

0 to >1 A

Resolution

100 µA

Accuracy

± 2.5 mA

Power Control (Constant Power Mode)

Photo Current Control Range

50 µA to 20 mA

Photo Current Resolution

1 µA

Photo Current Accuracy

±20 µA

Analog Modulation Input

Input Resistance

10 kW

Small Signal 3dB Bandwidth, CC Mode

DC to 100 kHz

Modulation Coefficient, CC Mode

100 mA/V ±5%

Modulation Coefficient, CP Mode

2 mA/V ±5%

Laser Current Monitor Output

Load Resistance

>10 kW

Transmission Coefficient

10 V/A ±5%

General data

Maximum Power Consumption

40 VA

Weight

<3.1 kg

5 Appendix

All technical data are valid at 23 ± 5°C and 45 ±15% humidity

© 2015 Thorlabs

29

LDC200C Series

Current Control (Constant Current Mode)

Control Range

0 to ±2 A

Compliance Voltage

>4 V

Resolution

100 µA

Accuracy

±2.0 mA

Noise Without Ripple (10Hz to 10MHz, rms, typ.)

<15 µA

Ripple (50/60Hz, rms, typ.)

<5 µA

Transients (typ.)

<2 mA

Drift, 24hours
(typ., 0-10Hz, at constant ambient temperature)

<100 µA

Temperature Coefficient

<50 ppm/°C

Current Limit

Setting Range

0 to >2 A

Resolution

100 µA

Accuracy

± 5 mA

Power Control (Constant Power Mode)

Photo Current Control Range

50 µA to 20 mA

Photo Current Resolution

1 µA

Photo Current Accuracy

±20 µA

Analog Modulation Input

Input Resistance

10 kW

Small Signal 3dB Bandwidth, CC Mode

DC to 50 kHz

Modulation Coefficient, CC Mode

200 mA/V ±5%

Modulation Coefficient, CP Mode

2 mA/V ±5%

Laser Current Monitor Output

Load Resistance

>10 kW

Transmission Coefficient

5 V/A ±5%

General data

Maximum Power Consumption

60 VA

Weight

<3.3 kg

5.1.6 LDC220C

All technical data are valid at 23 ± 5°C and 45 ±15% humidity

© 2015 Thorlabs30

5.1.7 LDC240C

Current Control (Constant Current Mode)

Control Range

0 to ±4 A

Compliance Voltage

>5 V

Resolution

100 µA

Accuracy

±4.0 mA

Noise Without Ripple (10Hz to 10MHz, rms, typ.)

<50 µA

Ripple (50/60Hz, rms, typ.)

<8 µA

Transients (typ.)

<4 mA

Drift, 24hours
(typ., 0-10Hz, at constant ambient temperature)

<200 µA

Temperature Coefficient

<50 ppm/°C

Current Limit

Setting Range

0 to >4 A

Resolution

100 µA

Accuracy

± 10 mA

Power Control (Constant Power Mode)

Photo Current Control Range

50 µA to 20 mA

Photo Current Resolution

1 µA

Photo Current Accuracy

±20 µA

Analog Modulation Input

Input Resistance

10 kW

Small Signal 3dB Bandwidth, CC Mode

DC to 30 kHz

Modulation Coefficient, CC Mode

400 mA/V ±5%

Modulation Coefficient, CP Mode

2 mA/V ±5%

Laser Current Monitor Output

Load Resistance

>10 kW

Transmission Coefficient

2.5 V/A ±5%

General data

Maximum Power Consumption

100 VA

Weight

<3.3 kg

5 Appendix

All technical data are valid at 23 ± 5°C and 45 ±15% humidity

© 2015 Thorlabs

31

LDC200C Series

5.2 Declaration of Conformity

© 2015 Thorlabs32

5 Appendix

5.3 Warranty

Thorlabs warrants material and production of the LDC200C Series for a period of 24 months
starting with the date of shipment. During this warranty period Thorlabs will see to defaults by
repair or by exchange if these are entitled to warranty.

For warranty repairs or service the unit must be sent back to Thorlabs. The customer will carry
the shipping costs to Thorlabs, in case of warranty repairs Thorlabs will carry the shipping costs
back to the customer.

If no warranty repair is applicable the customer also has to carry the costs for back shipment.
In case of shipment from outside EU duties, taxes etc. which should arise have to be carried by

the customer.

Thorlabs warrants the hard- and software determined by Thorlabs for this unit to operate fault­free provided that they are handled according to our requirements. However, Thorlabs does not
warrant a fault free and uninterrupted operation of the unit, of the software or firmware for
special applications nor this instruction manual to be error free. Thorlabs is not liable for
consequential damages.

Restriction of warranty

The warranty mentioned before does not cover errors and defects being the result of improper
treatment, software or interface not supplied by us, modification, misuse or operation outside
the defined ambient stated by us or unauthorized maintenance.

Further claims will not be consented to and will not be acknowledged. Thorlabs does explicitly
not warrant the usability or the economical use for certain cases of application.

Thorlabs reserves the right to change this instruction manual or the technical data of the
described unit at any time.

© 2015 Thorlabs

33

LDC200C Series

5.4 Copyright and Exclusion of Reliability

Thorlabs has taken every possible care in preparing this Operation Manual. We however
assume no liability for the content, completeness or quality of the information contained therein.
The content of this manual is regularly updated and adapted to reflect the current status of the
software. We furthermore do not guarantee that this product will function without errors, even if
the stated specifications are adhered to.

Under no circumstances can we guarantee that a particular objective can be achieved with the
purchase of this product.

Insofar as permitted under statutory regulations, we assume no liability for direct damage,
indirect damage or damages suffered by third parties resulting from the purchase of this
product. In no event shall any liability exceed the purchase price of the product.

Please note that the content of this User Manual is neither part of any previous or existing
agreement, promise, representation or legal relationship, nor an alteration or amendment
thereof. All obligations of Thorlabs result from the respective contract of sale, which also
includes the complete and exclusively applicable warranty regulations. These contractual
warranty regulations are neither extended nor limited by the information contained in this User
Manual. Should you require further information on this product, or encounter specific problems
that are not discussed in sufficient detail in the User Manual, please contact your local Thorlabs
dealer or system installer.

All rights reserved. This manual may not be reproduced, transmitted or translated to another
language, either as a whole or in parts, without the prior written permission of Thorlabs.

Copyright © Thorlabs 2015. All rights reserved.

© 2015 Thorlabs34

5 Appendix

Crossed out

"Wheelie Bin" symbol

5.5 Thorlabs 'End of Life' Policy (WEEE)

As required by the WEEE (Waste Electrical and Electronic Equipment Directive) of the
European Community and the corresponding national laws, Thorlabs offers all end users in the
EC the possibility to return “end of life” units without incurring disposal charges.

This offer is valid for Thorlabs electrical and electronic equipment

· sold after August 13th 2005

· marked correspondingly with the crossed out “wheelie bin” logo (see figure below)

· sold to a company or institute within the EC

· currently owned by a company or institute within the EC

· still complete, not disassembled and not contaminated

As the WEEE directive applies to self contained operational electrical and electronic products,
this “end of life” take back service does not refer to other Thorlabs products, such as

· pure OEM products, that means assemblies to be built into a unit by the user (e. g. OEM
laser driver cards)

· components

· mechanics and optics

· left over parts of units disassembled by the user (PCB’s, housings etc.).

Waste treatment on your own responsibility

If you do not return an “end of life” unit to Thorlabs, you must hand it to a company specialized
in waste recovery. Do not dispose of the unit in a litter bin or at a public waste disposal site.

WEEE Number (Germany) : DE97581288

Ecological background

It is well known that waste treatment pollutes the environment by releasing toxic products
during decomposition. The aim of the European RoHS Directive is to reduce the content of
toxic substances in electronic products in the future.

The intent of the WEEE Directive is to enforce the recycling of WEEE. A controlled recycling of
end-of-life products will thereby avoid negative impacts on the environment.

© 2015 Thorlabs

35

LDC200C Series

USA, Canada, and South America

Thorlabs, Inc.
56 Sparta Avenue
Newton, NJ 07860
USA
Tel: [phone]
Fax: [phone]

www.thorlabs.com
www.thorlabs.us (West Coast)

Email: [e-mail]
Support: [e-mail]

UK and Ireland

Thorlabs Ltd.
1 Saint Thomas Place, Ely
Cambridgeshire CB7 4EX
United Kingdom
Tel: [phone]
Fax: [phone]

www.thorlabs.com

Email: [e-mail]
Support: [e-mail]

Europe

Thorlabs GmbH
Hans-Böckler-Str. 6
85221 Dachau
Germany
Tel: [phone]
Fax: [phone]

www.thorlabs.de

Email: [e-mail]

Scandinavia

Thorlabs Sweden AB
Mölndalsvägen 3
412 63 Göteborg
Sweden
Tel: [phone]
Fax: [phone]

www.thorlabs.com

Email: [e-mail]

France

Thorlabs SAS
109, rue des Côtes
78600 Maisons-Laffitte
France
Tel: [phone]
Fax: [phone]

www.thorlabs.com

Email: [e-mail]

Brazil

Thorlabs Vendas de Fotônicos Ltda.
Rua Riachuelo, 171
São Carlos, SP 13560-110
Brazil
Tel: [phone]
Fax: [phone]

www.thorlabs.com

Email: [e-mail]

Japan

Thorlabs Japan, Inc.
Higashi Ikebukuro
Q Building 2nd Floor 2-23-2
Toshima-ku, Tokyo 170-0013
Japan
Tel: [phone]
Fax: [phone]

www.thorlabs.jp

Email: [e-mail]

China

Thorlabs China
Room A101, No. 100
Lane 2891, South Qilianshan Road
Putuo District
Shanghai 200331
China
Tel: [phone]
Fax: [phone]

www.thorlabs.com

Email: [e-mail]

5.6 Thorlabs Worldwide Contacts

© 2015 Thorlabs36