THORLABS LDC201U, LDC200V, LDC202B, LDC205B, LDC210B Operation Manual

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Operation Manual

Thorlabs Blueline™ Series

Laser Diode Controller

LDC2xx

2006

Version: 1.11 Date: 20.06.2006

Contents page

1 General Information 1

1.1 At a Glance 1

1.2 Safety 3

1.3 Ordering codes and accessories 5

2 Getting Started 6

2.1 Unpacking 6

2.2 Preparation 6

2.3 Operating elements 7

2.3.1 Operating elements on front panel 7

2.3.2 Operating elements on rear panel 8

2.4 First operation 9

3 Operating the LDC2xx 10

3.1 Connecting components 10

3.1.1 9-pole SUB-D output jack 10

3.1.2 Interlock and control LED for LASER ON 11

3.1.3 Connecting the laser diode and photodiode 12

3.1.4 Analog control output for the laser current 14

3.2 Setting the current limit "ILIM" 15

3.3 Selecting the laser diode polarity 15

3.4 Constant current mode (CONST I) 17

3.5 Constant power mode (CONST P) 18

3.5.1 Changing the "IPD" setting range 20

3.6 Calibrating the optical power display 21

3.7 Analog modulation of the laser diode 21

3.8 Over-temperature-protection of the LDC2xx 22 4 Remote control 23 5 Maintenance and Repair 24

5.1 Maintenance 24

5.2 Line voltage setting 25

5.3 Replacing the mains fuse 26

5.4 Internal Fuse Replacement 27

5.5 Troubleshooting 28 6 Appendix 30

6.1 Warranty 30

6.2 Certifications and compliances 31

6.3 Technical data 33

6.3.1 Common Data 33

6.3.2 Individual data LDC200V 34

6.3.3 Individual data LDC201U 35

6.3.4 Individual data LDC202B 36

6.3.5 Individual data LDC205B 37

6.3.6 Individual data LDC210B 38

6.3.7 Individual data LDC220 39

6.4 Thorlabs “End of Life” policy (WEEE) 40

6.4.1 Waste treatment on your own responsibility 40

6.4.2 Ecological background 41

6.5 List of acronyms 42

6.6 List of figures 42

6.7 Addresses 43

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 develop 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

This part of the instruction manual contains all the specific information on how to

operate a current module LDC2 xx. A general description is followed by explanations

on how to operate the unit manually. You will also find information about a simple

remote control of the unit.

Attention

This manual contains “WARNINGS” and “ATTENTION” labels in this form, to indicate personal danger or possible damage to equipment.

Please read these advises carefully!

NOTE

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

1.1 At a Glance

1 General Information

1.1 At a Glance

The laser diode controllers of the series LDC200 by Thorlabs GmbH are extremely precise controllers for laser diodes and LEDs. If a temperature controller by Thorlabs

GmbH is used additionally the injection current or the optical output power and the

temperature of the connected laser diode can be controlled simultaneously.

The LDC200V is designed for safe operation of VCSEL laser diodes.

The LDC201U provides ultra low noise current (<0.2µA RMS).

The new suffix “B” controllers offer an enhanced compliance voltage (>10V) for use

with blue laser diodes.

To protect the laser diode against dam age the LDC2xx provides the following

protection circuits:

• Softstart function

• Adjustable limitation of injection current

• Interlock (open circuit monitoring of the laser diode mount connection)

• Electronic shortcircuit for the laser diode in off-mode

• Separate key to switch the laser diode current on and off

• Monitoring LED for LASER ON mode

The LDC2xx is easy to use due to the clearly structured front panel.

Operating parameters are shown on an illuminated 4½-digit LCD display. The

parameter to be displayed is selected with a toggle switch.

The switch on/off delay and the softstart function protect the laser diode against

undesired transients.

An independent hardware limit for the inject ion current can be set with a 20-turn

potentiometer. This protects the laser diode against operating errors.

With the output open the laser diode is shortcircuited electronically so no voltage is

applied to the laser diode.

LDC2xx / page 1

1.1 At a Glance

When turned on the laser diode controller L DC2xx is automatica lly in LASER OFF

mode. The laser current can be switched on/off with a separate key at the front panel.

Laser diode and photodiode are connec ted by 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.

With a control signal at the output jack an external LED can be used to indicate

LASER ON.

The injection current or the optical output power of the laser diode can be modulated

via a modulation input at the rear of the unit.

For monitoring purposes a voltage proportional to the laser diode current is provided

at an analog control output at the rear.

If an error occurs or the limit for the la ser current is reached, the corresponding LED

lights up and a short beep gives a warning.

The installed mains filter and careful tr ansformer shielding provide low ripple and

noise at the output.

The internal cooling of the LDC200 with a fan protects t he 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.

Attention

Do not obstruct the air-ventilation slots in the housing!

If a laser diode head and the corresponding cable (CAB 400) by Thorlabs GmbH is

used, damages caused by wrong connections are impossible.

LDC2xx / page 2

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.

Before applying power to your LDC2xx system, make sure that the

protective conductor of the 3 conductor mains power cord is cor-

rectly 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 marked on the rear panel

agrees with your local supply and that the corresponding fuses are

inserted. If not, please have a service technician change the voltage

(see section 5.2).

Changing of the mains fuse can be done by the customer (see

section 5.3, Replacing the mains fuse)

The unit must not be operated in explosion endangered environ-

ments!

Laser and photodiodes must only be connected with duly shielded

connection cables.

Only with written consent from Thorlabs GmbH may changes to

single components be carried out or components not supplied by

Thorlabs GmbH be used.

This precision device is only dispatchable if duly packed into the

complete original packaging including the plastic form parts. If

necessary, ask for a replacement package.

LDC2xx / page 3

1.2 Safety

 Attention 

Laser modules can deliver up to several 100mW of (maybe) 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!

This laser safety class is marked on your external laser source used.

 Attention 

Mobile telephones, handy phones or other radio transmitters are not

to 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 EN 50 082-1.

LDC2xx / page 4

1.3 Ordering codes and accessories

Ordering-code Short description

LDC200V Laser diode controller, current range 0 ... 20 mA / 6 V LDC201U Laser diode controller, current range 0 ... 100 mA / 2.5 V

Ultra Low Noise

LDC202B Laser diode controller, current range 0 ... 200 mA / 10 V LDC205B Laser diode controller, current range 0 ... 500 mA / 10 V LDC210B Laser diode controller, current range 0 ... 1 A / 10 V LDC220 Laser diode controller, current range 0 ... 2 A / 4 V

laser diode heads for different laser diode packages: TCLDM9 Temperature controlled laser diode head for 3- and 4-pin

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

LDM21 Miniature sized temperature controlled laser diode head for 3- and

4-pin TO18-packages (9 mm CD, 5.6 mm CD)

LM14S2 laser diode head for laser modules in a 14-pin butterfly-package

(programmable pinning)

Shielded cable: CAB400 Cable to connect the laser di ode controller LDC200 to a Laser

Diode Head

LDC2xx / page 5

2.1 Unpacking

2 Getting Started

2.1 Unpacking

Inspect the shipping container for damage.

If the shipping container seems to be dam aged, keep it until you have inspected the

contents and you have inspected the LDC2xx mechanically and electrically.

Verify that you have received the following items:

1. 1 LDC2xx

2. 1 power cord, connector according to ordering country

3. 1 operation manual

4. 1 Connection cable CAB 400

2.2 Preparation

Prior to starting operation with a laser diode controller LDC2xx, check if the line

voltage specified on the letter plate agr ees with your local supply and if the

appropriate fuse is inserted. (To change t he line voltage see 5.2, “Line voltage” on

page 25)

Connect the unit to the line with the provided mains cable. Turn the unit on by means

of the line switch (L11).

Via the connector jack of the chassis ground (R 4) the external optical build-up can be

connected to ground potential, if required. The ground pi n of the laser diode is

internally connected to chassis ground.

LDC2xx / page 6

2.3 Operating elements

2.3.1 Operating elements on front panel

L1 L2 L3

L11 L12 L13 L14 L15 L16 L17 L18 L19 L20 L21 L22 L23 L24

L4 L5 L6 L7 L8 L9 L10

Figure 1 Display- and operating elements at the front panel

L1 LED "AG" Selected polarity of the laser: anode grounded L2 LED "CG" Selected polarity of the laser: cathode grounded L3 4½-digit LCD display L4 LED "mA" Current display in mA L5 LED "mW" Power display in mW L6 LED "OPEN" No laser diode connected L6 LED "ERR" No LD connected, Interlock open, OTP (only B version) L7 LED "LIM" Adjusted current limit reached L8 LED "ON" Laser current is switched on L9 Switch "ON" On/off switch for the laser current L10 Knob to enter set values L11 Mains switch L12 LIM I Potentiometer for setting the current limit L13 CAL Potentiometer for calibrating the power display L14 LED "PLD" Displaying the optical output power L15 LED "IPD" Displaying the photodiode current L16 LED "ILD" Displaying the laser current L17 LED "ILIM" Displaying current limit L18 DOWN Select the displayed value L19 UP Select the displayed value L20 LED "P" Constant power mode L21 LED "I" Constant current mode L22 Key "P" Select constant power mode L23 KEY "I" Select constant current mode L24 PD RANGE Potentiometer for setting the photodiode current range

LDC2xx / page 7

2.3 Operating elements

2.3.2 Operating elements on rear panel

Figure 2 Operating elements on the rear panel

R1 Modulation input/ analog control input "MOD IN", -10V … +10 V R2 Analogue control output "CTL OUT", 0 … ±10V R3 Fan R4 Connector for chassis ground R5 Connector "LD OUT" for laser diode, photodiode, interlock, status-LED R6 Switch "LD POL" for selecting the laser diode polarity R7 Serial number of the unit R8 Letterplate showing allowed and set mains voltage ranges R9 Mains connector and fuse holder

LDC2xx / page 8

2.4 First operation

Turn the unit on by means of the line switch (L11).

Via the connector jack of the chassis ground (R 4) the external optical build-up can be

connected to ground potential, if required. The ground pi n of the laser diode is

internally connected to chassis ground.

After switching on the unit, the LCD display (L3) must get visi ble and a LED must

light up indicating the selected parameters (L14 ... L17). If no display is shown please

check line voltage and line fuse.

By using the keys (L18) and (L19) you can select the desired value to be displayed at

any time.

The LDC2xx is immediately ready to use after turning on. The rated accuracy is

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

LDC2xx / page 9

3.1 Connecting components

3 Operating the LDC2xx

3.1 Connecting components

3.1.1 9-pole SUB-D output jack

The laser diode controller LDC2xx by Thorlabs GmbH can (according to the version) drive all laser diodes up to a maximum current rate of 2 A.

If laser mounts by Thorlabs GmbH are used just connect the input "LD DRIVER" of

the laser mount to the output jack "LD OUTPUT" (R5) with the cable CAB400.

If a laser mount TCLDM9 by Thorlabs is used, the polarity of laser diode and

photodiode must additionally be set with two s lide switches inside the laser mount

(refer to the individual operation manual).

If other laser diode mounts are used connec t the laser diode and if provided the

photodiode with shielded cables to "LD OUTPUT" (R5) according to the pin

assignment shown in Figure 3.

LDC2xx / page 10

3.1 Connecting components

5-4-3-2-1

9-8-7-6

Figure 3 Pin assignment of the "LD OUTPUT"jack (female)

pin connection

open circuit monitoring, status display: 1 interlock and status LASER ON/OFF 5 digital ground for pin 1

laser diode: 7 laser diode cathode (at AG) 8 laser diode anode (at CG) 3 laser diode ground

photodiode: 2 photodiode cathode 4 photodiode anode

3.1.2 Interlock and control LED for LASER ON

Pin 1 and pin 5 of the "LD OUTPUT" jack (R5) are test contacts to determine whether

a laser diode is connected or not or if the connection to the laser diode has been

interrupted during operation.

Figure 4 Connecting the interlock with and w i thout monitoring LED

LDC2xx / page 11

3.1 Connecting components

Pin 1 and pin 5 must be connected externa lly by a wire (total resistance <430 Ω).

When opening this connection, the LDC2xx swit ches automatically into LASER OFF

mode.

A LED can be connected in parallel to a resistor of <470 Ω between pin 1 and pin 5.

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

With the LDC2xxB the LED ERR (L6) lights up if the interlock is open.

3.1.3 Connecting the laser diode and photodiode

Connect laser diode and photodiode according to Figure 5 to the LDC2xx.

The ground connection of the laser diode (pin 3) may 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 measuring errors.

If the polarity selected with the switch "LD POL" (R6) and the c onnection of the laser

diode do not agree, no current is flowing through the laser diode.

LD POL: AG AG CG CG

Figure 5 Connecting laser diode and photodiode

LDC2xx / page 12

3.1 Connecting components

The laser diode is always sourced with re spect to ground. Compared to a floating

driver stage, this operation mode has the advantages of higher security for the laser

diode and better stability of the laser current.

If the photodiode shall be operat ed with bias voltage a battery can be connected in

series to the photodiode.

With polarity AG connect the positive terminal of the battery to the cathode of the

photodiode and the negative terminal of the battery to pin 2.

With polarity CG connect the negative terminal of the battery to the anode of the

photodiode and the positive terminal of the battery to pin 4.

pin 2

pin 4

G with Bias CG with Bias

Figure 6 Connecting laser diode and photodiode

 Attention 

A wrong polarity of the battery may destroy the photodiode due to a

forward current flowing through it!

LDC2xx / page 13

3.1 Connecting components

3.1.4 Analog control output for the laser current

At the output "CTL OUT" (R2) a volt age proportional to the laser current "I LD" is

available.

E.g. a recorder, an oscilloscope or an A/D converter card can be connected directly

to the output.

The output "CTL OUT" (R2) provides a voltage of 0 ... ±10 V for ILD = 0 ... ILD MAX.

With laser polarity "CG" the output voltage is positive (0 … +10 V), with laser polarity

"AG" the output voltage is negative (0 … -10 V).

The output "CTL OUT" (R2) is grounded.

Devices connected to this output should have an input resistance ≥10 kΩ.

When connecting a load avoid ground loops.

LDC2xx / page 14

3.2 Setting the current limit "ILIM"

Before operating a laser diode always set the lim it for the injection current to protect

the laser diode against destruction by operating errors.

Switch on the unit with the button "LINE" (L11).

If the unit had already been switched on before switch off the laser current with the

key "ON" (L9).

Select parameter "ILIM" with the button (L18) or (L19).

Use a screwdriver to set the desired current with the potentiometer "LIM I" (L12).

NOTE:

The current limit can be displayed at any time by selecting the parameter

"ILIM".

If the laser current reaches the set current limit "I LIM" during operation the LED "LIM"

(L7) lights up and a short beep gives a warning.

The current limit can also be adjusted with the output swit ched on. In any case you

should avoid an adjustment when the LED "LIM" (L7) lights up.

3.3 Selecting the laser diode polarity

With the laser diode controller LDC2xx all possible polarities of the laser diode and

the monitor diode can be used. The lase r diode will always be sourced with respect

to ground. Compared to a floating driv er stage this operat ion mode has the

advantages of higher security for the la ser diode and better stability and lower noise

of the laser current.

Prior to turn on the laser current the correct polarity of the laser diode must be

selected:

LDC2xx / page 15

3.3 Selecting the laser diode polarity

Switch off the LDC2xx.

Select the desired polarity with the switch "LD POL" (R6).

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 with the LED "AG" (L1) or "CG" (L2).

For safety reasons there is a mid position of the switch "LD POL" (R6).

NOTE:

If the mid position of the switch "LD POL" (R6) is selected, neither the LED

(L1) nor (L2) lights up. The laser current cannot be switched on.

If the laser diode is connected correctly (refer to chapter 3.1.3) but the polarity of the

laser diode selected wrong with switch (R 6) the laser diode current cannot be

switched on.

If the position of the switch "LD POL" (R 6) is changed with the la ser current switched

on the laser diode current is switched off automatically.

NOTE:

For safety reasons you should select the polarity for the laser diode only

with the laser diode current switched off.

LDC2xx / page 16

3.4 Constant current mode (CONST I)

Switch on the LDC2xx.

Select a suitable current limit "ILIM" (refer to chapter 3.2).

Select the appropriate laser polarity (refer to chapter 3.3).

Connect the laser diode (refer to chapter 3.1.3).

Select the display "ILD" with the button (L18) or (L19).

Set the adjust knob (L10) completely to the left.

Select constant current mode with key "I" (L23).

Switch on the output by pressing key "ON" (L9). The LED "ON" (L8) lights up, the

output is activated and the curr ent slowly rises (about 1 s) to the set value with knob

(L10).

NOTE:

The current output can only be switched on if the jack "LD OUTPUT" (R5)

is connected correctly.

The display shows the injection current "ILD".

With the adjust knob (L10) the laser curr ent can be set continuously between 0 mA

and the selected current limit "I

LIM".

If the injection current "I LD" reaches the set current limit "I LIM" during operation the

LED "LIM" (L7) lights up, a short beep as warning signal is heard and the laser

current is limited to the value of the current limit "I

LIM".

If the LED "LIM" (L7) lights up noise and ripple do not longer correspond to the

specifications for normal operation (refer to chapter 6.3). However exceeding the set

current limit "I

LDC2xx / page 17

LIM" is not possible.

3.5 Constant power mode (CONST P)

If the connection to the laser diode is in terrupted during operat ion the laser diode

current is switched off autom atically. LED "ON" (L8) ex tinguishes, LED "OPEN" (L6)

lights up and a short beep is heard as warning signal.

If the output is switched on wh ile the interlock is closed and there is no laser diode

connected at first the LED "ON" (L8) lights up and the output is switched on.

Immediately afterwards the LDC2xx rec ognizes the missing of the laser diode and

switches the output off.

The LED "ON" (L8) extinguishes and the LED "OPEN" (L6) lights up.

After pressing "ON" (L9) the LED "OPEN " (L6) extinguishes and the output can be

switched on again by pressing "ON" (L9).

If a photodiode is connected the displa y can show the photodiode current "I PD" or the

optical power "PLD" by pressing the keys (L18) or (L19).

The laser current can be modulated via t he connector "MOD IN" (R3) (refer to

chapter 3.7).

3.5 Constant power mode (CONST P)

With a photodiode connected the laser diode c an also be operated in constant power

mode:

Start operating the LDC2xx in constant current mode (refer to chapter 3.4)

Select the display "IPD" with the buttons (L18) or (L19).

Check whether an appropriate laser diode current "I PD" is available. A photodiode

current of at least 5 µA must be available for a stable operation of the power control.

NOTE:

With negative signs of the photodiode current "IPD" the photodiode must

be reverse connected.

LDC2xx / page 18

3.5 Constant power mode (CONST P)

By pressing "ON" (L9) switch off the laser current.

Select constant power (CONST P) with "P" (L22).

Set the adjust knob (L10) completely to the left.

Switch on the output by pressi ng "ON" (L9). The LED "ON" (L8) lights up, the output

is activated and the current slowly increas es (about 1 s) to the value set with the

knob (L10).

With the knob (L10) you can cont inuously set the photodiode current "I PD" and thus

the optical power of the lase r diode until the laser current "I LD" reaches the selected

current limit "ILIM".

If the desired photodiode current "I PD" cannot be set exactly enough with the knob

(L10), the range of the knob (L10) can be adapted to the provided photodiode current

in wide ranges with the potentiometer "PD RANGE" (L24).

If no photodiode is connected or the polarity of the photodiod e is set wrong (refer to

chapter 3.3), the laser current "I LD" increases to the set current limit "I LIM" after the

output is switched on.

If the photodiode current "I PD" is interrupted in constant power mode, the laser

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

If the injection current "I LD" is limited by the se lected current limit "I LIM" ripple and

noise do no longer correspond to the specific ations for normal operation. However,

the set maximum current "I

LIM" cannot be exceeded.

If the connection to the laser diode is in terrupted during operat ion the output is

switched off automatically. LED "ON" (L8) extinguishes , LED "OPEN" (L6) lights up

and a short beep is heard as warning.

If the output is switched on wh ile the interlock is closed and there is no laser diode

connected, at first the LED "ON" (L8) lights up and the output is switched on.

Immediately afterwards the LDC2xx rec ognizes the missing of the laser diode,

switches the output off, the LED "ON" ( L8) extinguishes and t he LED "OPEN" (L6)

lights up.

LDC2xx / page 19

3.5 Constant power mode (CONST P)

After pressing "ON" (L9) the LED "OPEN " (L6) extinguishes and the laser diode

current output can be switched on again by pressing "ON" (L9).

The laser current can be modulated via t he connector "MOD IN" (R3) (refer to

chapter 3.7).

3.5.1 Changing the "IPD" setting range

To guarantee an easy setting of the operati ng point in constant power mode even

with small photodiode currents t he full scale of the adjustment knob (L10) can be set

with potentiometer "PD RANGE" (L24) between 0.6 mA and 2 mA.

Turn the potentiometer "PD RANGE" (L24) comp letely to the left (i.e. full scale = 0.6

mA).

Turn the adjust knob (L10) completely to the left.

Select constant power mode CONST P, connect the laser diode and the photodiode

and switch on the laser current.

Set the desired photodiode current with the knob (L10).

If the desired operating point cannot be reac hed even if the knob (L10) is turned

completely to the right (i.e. I PD > 0.6 mA), turn the potent iometer "PD RANGE" (L24)

to the right until the desired setting range has been reached.

NOTE:

Changing the position of the potentiometer "PD RANGE" (L24) changes

the set value in constant power mode. In constant current mode the

potentiometer "PD RANGE" is without function.

LDC2xx / page 20

3.6 Calibrating the optical power display

Additional to the photodiode current "I PD" also the optical power of the laser diode

can be displayed. The actual optical power is shown only after calibration of the

power display. For calibration the potentiometer "CAL PD" (L13) is used.

Select constant current mode CONST I.

With the knob (L10) either set a laser current "I LD" or a monitor current "I PD" where

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

laser diode. The better way is to measure the laser power with an external optical

power meter.

Select the display "PLD" (L5) with the keys (L18) or (L19).

Calibrate the display "P LD" with potentiometer "CAL PD" (L13) to the value of the

actual optical power.

3.7 Analog modulation of the laser diode

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" (R1). Maximum allowed input vo ltage is –10 V … +10 V, input resistance

>10 kΩ.

"ILD" and "IPD" are calculated as:

ILD = ILD SET + IMAX * UMOD / 10 V

or IPD = IPD SET + 0.2 mA * UMOD

with:

ILD SET or IPD SET: value set with (L10)

UMOD: voltage at "MOD IN" (R1)

Start operation in constant cu rrent or constant power mode (refer to chapter 3.4 or

3.5) and adjust the desired set value with the knob (L10).

LDC2xx / page 21

3.8 Over-temperature-protection of the LDC2xx

Connect the modulation source to the ja ck "MOD IN" (R1). Avoid ground loops when

connecting the function generator.

The laser diode current "I LD" can be supervised at the anal og output "CTL OUT" (R2)

(refer to chapter 3.1.4).

If the injection current "I LD" reaches the set current limit "I LIM" in operation the LED

"LIM" (L7) lights up, a beep is given as short warning signal and the laser current is

limited to the value of the current limit "ILIM".

If the injection current "I LD" is limited by the se lected current limit "I LIM" ripple and

noise do no longer correspond to the specif ications for normal operation (refer to

chapter 6.3). However the set maximum current "ILIM" cannot be exceeded.

3.8 Over-temperature-protection of the LDC2xx

The laser diode controllers LDC205(B), LDC210(B) and LDC220 have an automatic

over-temperature-protection. If overheated by operating errors or high ambient

temperatures the current out put of the module is swit ched off automatically. LED

"ERR" (L6, B- version only), lights up and the beeper gives a short warning signal.

The current through the laser diode is swit ched off immediately. Pressing key "ON"

(L9) has no effect in this case.

When the temperature withi n the unit has dropped for about 10 °C the LED "ERR"

(L6) extinguishes and the laser current output can be switched on again.

LDC2xx / page 22

3.8 Over-temperature-protection of the LDC2xx

4 Remote control

The units of the LDC200 series do not provide any standard computer interface.

By using the analog inputs and outputs however simple semi-automatic systems may

be build up.

The following control or read back functions are possible:

Interlock

If a relay contact or an open collector transisto r is inserted in the interlock line (refer

to chapter 3.1.2), the output can be switched off automatically at any time.

An automatic reactivation however is not possible.

Setting the laser diode current

If the adjusting knob (L10) is set to the le ft stop the set laser diode current value can

be controlled with an analog voltage of 0 ...+10 V at the “MOD IN”-input, R1. If L10 is

at his right stop, you can also use a control voltage of –10 V … 0 V.

Thus a setting via D/A converter is easily possible. Input resistance of L10 is >10 kΩ

Monitoring the laser current

If an A/D converter is connect ed to the output "CTL OUT" (R2) the laser current can

easily be monitored. Output voltage is 0 … ±10 V, 0 …+10 V with cathode grounded,

0 … -10 V with anode grounded. Load resistance should be >10 kΩ.

NOTE

All operating elements of the LDC2xx are active at any time. For automatic

tests make sure that the manual settings are not changed during opera-

tion.

LDC2xx / page 23

5.1 Maintenance

5 Maintenance and Repair

5.1 Maintenance

Protect the LDC2xx from adverse weather conditions. The LDC2xx is not water

resistant.

Do not store or leave t he LDC2xx where the LCD display will be exposed to direct

sunlight for long periods of time.

 Attention 

To avoid damage to the LDC2xx, do not expose it to spray, liquids or

solvents!

The unit does not need a regular maintenance.

If necessary the unit and the LCD display can be cleaned with a cloth dampened with

water.

You can use a mild 75% Isopropyl Alcohol solution for more efficient cleaning.

The LDC2xx does not contain any modules that can be repaired by users. If a

malfunction occurs send the unit to Thorlabs GmbH for repair.

To guarantee the specifications given in chapter 6.3 over a long period it is

recommended to have the unit calibrated by Thorlabs GmbH every two years.

LDC2xx / page 24

5.2 Line voltage setting

The laser diode controller LDC200 operates at fixed line voltages of 90 V … 115 V,

104 V … 132 V or 207 V … 264 V.

The Line voltage setting can be changed only by qualified service personnel.

Disconnect Power. To avoid electrical shock, first switch off the LDC2x x

power, and then disconnect the power cord from the mains power.

With the LDC2xx turned over, remove the tw o screws that secure the cover to the

chassis. One of the screws has a paint piercing washer.

Remove the unit by sliding it out of t he cover. With the unit set upright, you

will find the range switch near the front of the unit, next to the transformer (see

Figure 9)

Using a flat-blade screwdriver, turn the switch to the desired range by aligning

the triangle with the appropriate volt age (100V, 115V, or 230V +15%, -10%

each). Ensure that the switch has clicked into one of the three positions and is

not between positions.

On the back of the instrument, remove the indicator screw from the old

location and install it in the location corresponding to the new range setting.

 Attention 

If you have changed to or from 230 V, also change the mains fuse to

the correct value given in section 5.3 of this manual.!

Reattach the cover, ensuring that the paint piercing screw is in the original location.

LDC2xx / page 25

5.3 Replacing the mains fuse

If the mains fuse has opened due to line distor tions, incorrect line voltage or other

causes, it can be easily replaced from the rear without opening the unit.

Attention

To avoid risk of fire only the appropriate fuse for the corresponding

line voltage must be used.

1. Turn off the LDC2xx and disconnect the mains cable.

2. Open the fuse drawer in the main s connector R9 (see Figure 7) with a

screwdriver.

3. Replace the defective fuse (one spare fuse is included in the fuse holder) and

close the drawer.

LDC200V and LDC201U:

100 V 250 mA, Slow, 250V T0.25A250V

115 V 250 mA, Slow, 250V T0.25A250V

230 V 160 mA, Slow, 250V T0.16A250V

LDC202B, LDC205B, LDC210B and LDC220:

100 V 500 mA, Slow, 250V T0.5A250V

115 V 500 mA, Slow, 250V T0.5A250V

230 V 250 mA, Slow, 250V T0.25A250V

All fuses are to be IEC 60127-2/III

Figure 7 Changing the mains fuse

LDC2xx / page 26

5.4 Internal Fuse Replacement

Internal fuses must be changed only by qualified service personnel.

Open the unit like described in section 5.2.

Depending on the type of LDC2xx(B), you will find adhesive labels on the transformer

depicting type and location of the internal fuses.

LDC200VCSEL / LDC 201 / LDC 202

R452.500 or 0454.500 (T 500 mA)

Si2

R452.500 or 0454.500 (T 500 mA)

Si1

Fu s e Ty p e : Littelfuse NANO ™Slo-Blo 452/454

R452.500 or 0454.500 (T 500 mA)

Si3

Si2

R452.500 or 0454.500 (T 500 mA)

Si1

R452.500 or 0454.500 (T 500 mA)

Si 4

Fu s e Ty p e : Littelfuse NANO ™Slo-Blo 452/454

LDC 205 / 210 / 220

GmbH

(T 2 A) R452 002. or 0454 002.

(T 2A) R452 002. or 0454 002.

Si3

Si 4

Figure 8 Label ‘Internal fuses’

Use only fuses of the type ‘Littelfuse NANO2® Slo-Blo Fuse 452/454 Series’.

TY PE: L DC 20 2

Opt io

S/N:

Tektroni x Mun ich Gmb H

Made in Germany

)

(

. 4

Si4

Si3

. 4

™

lf e s

Line voltage switch

Label for internal fuses

Figure 9 Setting the line voltage

Replace the defective fuse and close the unit again.

LDC2xx / page 27

5.5 Troubleshooting

In case that your LDC200 system show s malfunction please check the following

items:

 Module does not work at all (no display on the mainframe):

 Mainframe LDC200 connected properly to the mains?

 Connect the LDC200 to the power line paying attention to the right voltage

setting of your mainframe.

 Mainframe LDC200 turned on?

 Turn on your LDC200 with the key mains-switch.

 Control the fuse at the rear panel of the LDC200 mainframe.

 If blown up replace the fuse by the correct type

 You don’t get the desired laser output power

 Is the interlock closed?

 Control the resistance between the interlock pins of the connector jack not

to be more than 430 Ω.

 (refer to section 3.1.2, “Interlock and control LED for LASER ON” on page

11)

 Do you have turned on the laser output with the "ON" button?

 Change the setting from “off” to “on”.

 The LED “ON” on the front panel of the mainframe must be on

 Is the current limit I

 Adjust the hardware limit I

set to 0?

LIM

by means of the potentiometer on the LDC2xx

LIM

front panel to an appropriate value.

LDC2xx / page 28

5.5 Troubleshooting

 Is the laser diode installed properly?

 Control the connection cable.

 Is the laser diode polarity set correctly?

 If not change the polarity of the diode or set the polarity switch at the

LDC2xx to opposite polarity.

 Is the photo diode connected properly?

 Check the connecting cable.

 Is the photo diode poled correctly?

 If in constant power mode the displayed photodiode current is negative you

must revert the polarity of the photodiode.

 Are you using a bias voltage with the photo diode in photocurrent mode?

Change the polarity of the diode for photo element mode or change the po-

larity of the bias voltage source.

 Is the desired output power programmed correctly?

 Adjust the desired output power P

with the tuning knob.

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

contact the Thorlabs GmbH-Hotline ( europe@thorlabs.com) before sending the LDC200 for checkup and repair to Thorlabs GmbH - Germany.

(refer to section 6.7, “Addresses ” on page 43)

LDC2xx / page 29

6.1 Warranty

6 Appendix

6.1 Warranty

Thorlabs GmbH warrants material and production of the LDC2xx for a period of 24

months starting with the date of shipment. During this warranty period Thorlabs

GmbH 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 GmbH

(Germany) or to a place determined by Thorlabs GmbH. The customer will carry the

shipping costs to Thorlabs GmbH, in case of warranty repairs Thorlabs GmbH 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 GmbH warrants the hard- and software determined by Thorlabs GmbH for

this unit to operate fault-free provided that they are handled according to our

requirements. However, Thorlabs GmbH does not warrant a fault free and

uninterrupted operation of the unit, of the soft- or firmware for special applications nor

this instruction manual to be error free. Thorlabs GmbH 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 consent ed to and will not be acknowledged. Thorlabs

GmbH does explicitly not warrant the usab ility or the economical use for certain

cases of application.

Thorlabs GmbH reserves the right to change this instruction manual or the technical

data of the described unit at any time.

LDC2xx / page 30

6.2 Certifications and compliances

Certifications and compliances

Category Standards or description

EC Declaration of Conformity EMC

EN 61326 EMC requirements for Class A electrical equipment

IEC 61000-4-2 Electrostatic Discharge Immunity (Performance

IEC 61000-4-3 Radiated RF Electromagnetic Field Immunity

IEC 61000-4-4 Electrical Fast Transient / Burst immunity

IEC 61000-4-5 Power line Surge Immunity (Performance criterion

IEC 61000-4-6 Conducted RF Immunity (Performance criterion B) IEC 61000-4-11 Voltage Dips and Interruptions Immunity

EN 61000-3-2 AC power line harmonic emissions

Australia / New Zealand Declaration of Conformity EMC

FCC EMC Compliance

Compliance demonstrated using high-quality shielded interface cables.

Compliance demonstrated with CAB400 cable installed at the LD Output port.

Emissions, which exceed the levels required by these standards, may occur when this equipment

is connected to a test object.

Minimum Immunity Test requirement.

MOD IN port capped at IEC 61000-4-3 test.

Meets intent of Directive 89/336/EEC for Electromagnetic Compatibility. Compliance was demonstrated to the following specifications as listed in the Official Journal of the European Communities:

for measurement, control and laboratory use, including Class A Radiated and Conducted Emissions

1,2,3

and Immunity.

1,2,4

criterion C)

(Performance criterion B)

(Performance criterion C)

Complies with the Radiocommunications Act and demonstrated per EMC Emission standard

1,2,3

AS/NZS 2064 Industrial, Scientific, and Medical

Equipment: 1992

Emissions comply with the Class A Limits of FCC Code of Federal Regulations 47, Part 15, Subpart B

1,2,3

LDC2xx / page 31

6.2 Certifications and compliances

Certifications and compliances

Category Standards or description

EC Declaration of Conformity Low Voltage

EN 61010-1/A2:1995 Safety requirements for electrical

U.S. Nationally Recognized Testing Laboratory Listing

Canadian Certification

Additional Compliance

Equipment Type Test and measuring Safety Class Class 1 (as defined in IEC 61010-1, Annex H) - grounded product

Compliance was demonstrated to the following specification as listed in the Official Journal of the European Communities:

Low Voltage Directive 73/23/EEC, amended by 93/68/EEC

equipment for measurement control and laboratory use.

UL3111-1 Standard for electrical measuring and

test equipment.

ANSI/ISA S82.01:1994 Safety standard for electrical and

electronic test, measuring, controlling, and related equipment.

CAN/CSA C22.2 No. 1010.1 Safety requirements for electrical

equipment for measurement, control, and laboratory use.

IEC61010-1/A2:1995 Safety requirements for electrical

equipment for measurement, control, and laboratory use.

LDC2xx / page 32

6.3 Technical data

6.3.1 Common Data

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

Connectors:

Laser diode, photodiode, LD ON signal,

Interlock (0 … 5 V) LD OUTPUT 9-pin D-Sub-jack

Modulation input (-10 V … +10 V) MOD IN BNC

Control output (0 … 10 V) CTL OUT BNC

Chassis ground 4 mm banana jack

Mains input IEC 320

General data:

Line voltage 100 V / 115 V / 230 V (-10%, +15 %) (fixed)

Line frequency 50 ... 60 Hz

Power consumption (max.):

LDC200V 20 VA

LDC201U 20 VA

LDC202B 25 VA

LDC205B 30 VA

LDC210B 40 VA

LDC220 60 VA

Supply mains overvoltage Category II (Cat II)

Operating temperature

0 ... +40 °C

Storage temperature -40°C ... +70 °C

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

Pollution Degree (indoor use only) 2

Operation altitude < 3000 m

Warm-up time for rated accuracy 10 min

Weight ≤ 3 kg

Dimensions W x H x D 146 x 70 x 316 mm³

non condensing

LDC2xx / page 33

6.3 Technical data

6.3.2 Individual data LDC200V

Constant current mode:

Control range (continuously variable) 0 ... ± 20 mA

Setting / Measurement Resolution 1 µA

Accuracy ± 20 µA

Compliance voltage > 6 V

Noise without ripple (10 Hz ... 10 MHz), typ. << 1.5 µA

Ripple (50/60 Hz, rms), typ. << 1.5 µA

Transients, typ. < 20 µA

Short-time fluctuations (15 s, 0 ... 10 Hz), typ. < 5 µA

Temperature coefficient ≤ 50 ppm/°C

Drift at constant ambient temperature (24 hours, 0 ... 10 Hz), typ. ≤ 2 µA

Constant power mode:

Control range photodiode current 5 µA ... 2 mA

Setting accuracy ± 2 µA

Resolution photodiode current 0.1 µA

Resolution optical power 1 µW

Laser current limit:

Setting range 0 ... > 20 mA

Setting accuracy ± 0.05 mA

Resolution 1 µA

Analog modulation/voltage control:

Input resistance 10 kΩ

Small signal 3dB bandwidth (constant current) DC ... 250 kHz

Modulation coefficient (CC) 2 mA/V±5%

Modulation coefficient (CP) 0.2 mA/V ± 5%

Control output (ILD):

Load resistance ≥ 10 kΩ

Transfer coefficient 500 V/A ±5%

LDC2xx / page 34

6.3 Technical data

6.3.3 Individual data LDC201U

Constant current mode:

Control range (continuously variable) 0 ... ± 100 mA

Setting / measurement resolution 10 µA

Accuracy ± 50 µA

Compliance voltage > 2.5 V

Noise without ripple (10 Hz ... 10 MHz), typ. < 0.2 µA

Ripple (50/60 Hz, rms), typ. < 0.5 µA

Transients < 50 µA

Short-time fluctuations (15 s, 0 ... 10 Hz), typ. < 5 µA

Temperature coefficient ≤ 50 ppm/°C

Drift at constant ambient temperature (24 hours, 0 ... 10 Hz), typ. ≤ 2 µA

Constant power mode:

Control range photodiode current 5 µA ... 2 mA

Setting accuracy ± 2 µA

Resolution photodiode current 0.1 µA

Resolution optical power 1 µW

Laser current limit:

Setting range 0 ... > 100 mA

Setting accuracy ± 0.5 mA

Resolution 0.01 mA

Analog modulation/voltage control:

Input resistance 10 kΩ

Small signal 3dB bandwidth (constant current) DC ... 3 kHz

Modulation coefficient (CC) 10 mA/V±5%

Modulation coefficient (CP) 0.2 mA/V ± 5%

Control output (ILD):

Load resistance ≥ 10 kΩ

Transfer coefficient 100 V/A ±5%

LDC2xx / page 35

6.3 Technical data

6.3.4 Individual data LDC202B

Constant current mode:

Control range (continuously variable) 0 ... ± 200 mA

Setting / measurement resolution 10 µA

Accuracy ± 0.1 mA

Compliance voltage > 10 V

Noise without ripple (10 Hz ... 10 MHz), typ. < 1.5 µA

Ripple (50/60 Hz, rms), typ. < 1.5 µA

Transients < 200 µA

Short-time fluctuations (15 s, 0 ... 10 Hz), typ. < 10 µA

Temperature coefficient ≤ 50 ppm/°C

Drift at constant ambient temperature (24 hours, 0 ... 10 Hz), typ. ≤ 3 µA

Constant power mode:

Control range photodiode current 5 µA ... 2 mA

Setting accuracy ± 2 µA

Resolution photodiode current 0.1 µA

Resolution optical power 1 µW

Laser current limit:

Setting range 0 ... > 200 mA

Setting accuracy ± 0.5 mA

Resolution 0.01 mA

Analog modulation/voltage control:

Input resistance 10 kΩ

Small signal 3dB bandwidth (constant current) DC ... 250 kHz

Modulation coefficient (CC) 20 mA/V ± 5%

Modulation coefficient (CP) 0.2 mA/V ± 5%

Control output:

Load resistance ≥ 10 kΩ

Transfer coefficient 50 V/A ±5%

LDC2xx / page 36

6.3 Technical data

6.3.5 Individual data LDC205B

Constant current mode:

Control range (continuously variable) 0 ... ± 500 mA

Setting / measurement resolution 0.1 mA

Accuracy ± 0.1 mA

Compliance voltage > 10 V

Noise without ripple (10 Hz ... 10 MHz), typ. < 3 µA

Ripple (50/60 Hz, rms), typ. < 2 µA

Transients < 500 µA

Short-time fluctuations (15 s, 0 ... 10 Hz), typ. < 10 µA

Temperature coefficient ≤ 50 ppm/°C

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

Constant power mode:

Control range photodiode current 5 µA ... 2 mA

Setting accuracy ± 2 µA

Resolution photodiode current 0.1 µA

Resolution optical power 1 µW

Laser current limit:

Setting range 0 ... > 500 mA

Setting accuracy ± 1.5 mA

Resolution 0.1 mA

Analog modulation/voltage control:

Input resistance 10 kΩ

Small signal 3dB bandwidth (constant current) DC ... 150 kHz

Modulation coefficient (CC) 50 mA/V ± 5%

Modulation coefficient (CP) 0.2 mA/V ± 5%

Control output:

Load resistance ≥ 10 kΩ

Transfer coefficient 20 V/A ±5%

LDC2xx / page 37

6.3 Technical data

6.3.6 Individual data LDC210B

Constant current mode:

Control range (continuously variable) 0 ... ± 1 A

Setting / measurement resolution 0.1 mA

Accuracy ± 1 mA

Compliance voltage > 10 V

Noise without ripple (10 Hz ... 10 MHz), typ. < 5 µA

Ripple (50/60 Hz, rms), typ. < 3 µA

Transients < 1 mA

Short-time fluctuations (15 s, 0 ... 10 Hz) , typ. < 25 µA

Temperature coefficien ≤ 50 ppm/°C

Drift at constant ambient temperature (24 hours, 0 ... 10 Hz), typ. ≤ 20 µA

Constant power mode:

Control range photodiode current 5 µA ... 2 mA

Setting accuracy ± 2 µA

Resolution photodiode current 0.1 µA

Resolution optical power 0.1 mW

Laser current limit:

Setting range 0 ... > 1 A

Setting accuracy ± 2.5 mA

Resolution 0.1 mA

Analog modulation/voltage control:

Input resistance 10 kΩ

Small signal 3dB bandwidth (current control) DC ... 100 kHz

Modulation coefficient (CC) 100 mA/V

Modulation coefficient (CP) 0.2 mA/V ± 5%

Control output:

Load resistance ≥ 10 kΩ

Transfer coefficient 10 V/A ±5%

LDC2xx / page 38

6.3 Technical data

6.3.7 Individual data LDC220

Constant current mode:

Control range (continuously variable) 0 ... ± 2 A

Setting / measurement Resolution 0.1 mA

Accuracy ± 2 mA

Compliance voltage > 4 V

Noise without ripple (10 Hz ... 10 MHz) < 15 µA

Ripple (50/60 Hz, rms), typ. < 5 µA

Transients < 100 µA

Short-time fluctuations (15 s, 0 ... 10 Hz), typ. < 2 mA

Temperature coefficient ≤ 50 ppm/°C

Drift at constant ambient temperature (24 hours, 0 ... 10 Hz), typ. ≤ 100 µA

Constant power mode:

Control range photodiode current 5 µA ... 2 mA

Setting accuracy ± 2 µA

Resolution photodiode current 0.1 µA

Resolution optical power 0.1 mW

Laser current limit:

Setting range 0 ... > 2 A

Setting accuracy ± 5 mA

Resolution 0.1 mA

Analog modulation/voltage control:

Input resistance 10 kΩ

Small signal 3dB bandwidth (current control) DC ... 50 kHz

Modulation coefficient (CC) 200 mA/V

Modulation coefficient (CP) 0.2 mA/V ± 5%

Control output:

Load resistance ≥ 10 kΩ

Transfer coefficient 5 V/A ±5%

LDC2xx / page 39

6.4 Thorlabs “End of Life” policy (WEEE)

As required by the WEEE (Was te 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 retu rn “end of life” units without incurring

disposal charges.

This offer is valid for Thorlabs electrical and electronic equipment

• sold after August 13

• marked correspondingly with the crossed out “wheelie bin” logo (see Figure

10)

• 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

2005

As the WEEE directive applies to self cont ained operational electrical and electronic

products, this “end of life” take back se rvice 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.).

If you wish to return a Thorlabs unit for wa ste recovery, please contact Thorlabs or

your nearest dealer for further information.

6.4.1 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.

LDC2xx / page 40

6.4 Thorlabs “End of Life” policy (WEEE)

6.4.2 Ecological background

It is well known that WEEE pollutes the environment by releasing toxic products

during decomposition. The aim of the Eu ropean RoHS directive is to reduce the

content of toxic substances in electronic products in the future.

The intent of the WEEE dire ctive is to enforce the re cycling of WEEE. A controlled

recycling of end of live products will t hereby avoid negative impacts on the

environment.

Figure 10 Crossed out “wheelie bin” symbol

LDC2xx / page 41

6.5 List of acronyms

The following acronyms are used in this manual:

AC Alternating Current

AG Anode Ground

CC Constant Current mode

CG Cathode Ground

CP Constant Power mode

DC Direct Current

LD Laser Diode

LDC Laser Diode Controller

LED Light Emitting Diode

OTP Over TemPerature

PD Photo Diode

TEC Thermo Electric Cooler (Peltier Element)

VCSEL Vertical Cavity Surface Emitting Laser

6.6 List of figures

Figure 1 Display- and operating elements at the front panel 7 Figure 2 Operating elements on the rear panel 8 Figure 3 Pin assignment of the "LD OUTPUT"jack (female) 11 Figure 4 Connecting the interlock with and without monitoring LED 11 Figure 5 Connecting laser diode and photodiode 12 Figure 6 Connecting laser diode and photodiode 13 Figure 7 Changing the mains fuse 26 Figure 8 Label ‘Internal fuses’ 27 Figure 9 Setting the line voltage 27 Figure 10 Crossed out “wheelie bin” symbol 41

LDC2xx / page 42

6.7 Addresses

Our Company is represented by several di stributors and sales offices throughout the

world.

Europe

Thorlabs GmbH

Gauss-Strasse 11

D-85757 Karlsfeld

Germany

Sales and Support

Phone: +49 (0) 81 31 / 5956-0

Fax: +49 (0) 81 31 / 5956-99

Email: europe@thorlabs.com Web: www.thorlabs.com

USA

Thorlabs, Inc.

435 Route 206 North

Newton, NJ 07860

USA

Sales and Support

Phone: 1-973-579-7227

Fax: 1-973-300-3600

Email: sales@thorlabs.com Email: techsupport@thorlabs.com Web: www.thorlabs.com

LDC2xx / page 43

6.7 Addresses

Japan

Thorlabs, Inc.

3-6-3, Kitamachi,

Nerima-ku, Tokyo 179-0081

Japan

Sales and Support

Phone: +81-3-6915-7701

Fax: +81-3-6915-7716

Email: sales@thorlabs.jp Web: www.thorlabs.co.jp

Please call our hotlines, send an Email to ask fo r your nearest distributor or just visit

our homepage

http://www.thorlabs.com

LDC2xx / page 44

6.7 Addresses

A/D ...................................................23

accessories.........................................5

acronyms..........................................42

addresses .........................................43

calibration .........................................21

cc......................................................17

certifications......................................31

cleaning ............................................24

compliances......................................31

connector..........................................10

constant

current.......................................7, 17

power ........................................7, 18

laserdiode ........................................ 12

ld output........................................... 11

letterplate........................................... 8

limit (current)...................................... 7

line voltage....................................... 25

mains voltage............................... 8, 25

modulation ....................................... 21

operating elements ............................ 7

packing list ......................................... 6

photodiode....................................... 12

polarity ........................................12, 15

cp......................................................18

current limit ...................................7, 15

D/A ...................................................23

display ................................................7

fuse.............................................26, 27

ground ................................................8

interlock ......................................11, 28

remote control.................................. 23

repair ............................................... 24

safety ................................................. 3

service ............................................. 24

technical data................................... 33

temperature

protection ..................................... 22

troubleshooting ................................ 28

warranty........................................... 30

LDC2xx / page 45

THORLABS LDC201U, LDC200V, LDC202B, LDC205B, LDC210B Operation Manual

Specifications and Main Features

Frequently Asked Questions

User Manual