THORLABS INT-COM-1300 Operation Manual

Operation Manual

Thorlabs Instrumentation

INT-COM-1300

Common Path OCT Interferometer

V

ersion: 1.0

Date: 30-11-2007

Copyright© 2007, Thorlabs GmbH

Contents Page

1 Overview 1

1.1 Ordering Codes and Customization 1

1.2 Safety 2

2 Getting Started Quickly 3

2.1 Unpacking 3

2.2 Setup 3

2.3 First Operation 4

3 Detailed Description 5

3.1 General Principle of Operation 5

3.2 Optical Input and Output, Fiber Network 6

3.3 Electrical Output 9

3.4 Detector Responsivity 11

3.5 Mounting the INT-COM-1300 12

3.6 Basic Measurement Setup 13

3.7 Recommendations 15

4 Maintenance and Repair 16

4.1 General Care 16

4.2 Cleaning 16

4.3 Repair 17

5 Appendix 18

5.1 Technical Data 18

5.2 Mechanical Drawing 19

5.3 Warranty 20

5.4 Certifications and Compliances 21

5.5 Thorlabs “End of Life” Policy (WEEE) 22

5.5.1 Waste treatment on your own responsibility 22

5.5.2 Ecological background 23

5.6 List of Figures 24

5.7 List of Acronyms 24

5.8 Addresses 25

We aim to develop and produce the best solution for your application in the
field of optical measurement technique. To help us to come 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 hear from you.

Thorlabs GmbH

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

handle and use the INT-COM-1300 Common Path OCT Interferometer. A general

description is followed by explanations of how to operate the unit.

Attention

This manual contains “WARNINGS” and “ATTENTION” label in this form, to

indicate danger for persons or possible damage of equipment.

Please read these advises carefully!

NOTE

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

1 Overview

1 Overview

The Thorlabs INT-COM-1300 Common Path OCT Interferometer is a subassembly to

be used in swept source Fourier domain OCT systems and other applications. It

contains a fusion coupler network to operate with an external Common Path

interferometer probe. The generated interference fringes are detected by an

integrated balanced detector. The used fusion couplers are optimized for flat

wavelength response and very low PDCR (polarization dependant coupling ratio

change) to make the signal nearly independent of input polarization changes. An

additional aiming laser input simplifies the optical alignment of the probe.

The “Getting Started Quickly” section below gives an overview of how to set up the

INT-COM-1300

Common Path OCT Interferometer. Subsequent sections contain

detailed information about principle of operation, operating suggestions and technical

specifications.

1.1 Ordering Codes and Customization

Ordering code::

INT-COM-1300 Common Path OCT Interferometer, 1250 - 1350nm

Different wavelength ranges can be ordered on request.

For the standard version, mounting holes are located on the small edges of the

enclosure. An alternative cover with four mounting holes as well as a customized

cover can be ordered on request.

Please refer to www.thorlabs.com for new models.

INT-COM-1300 / page 1

1 Overview

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 connecting the power supply to the mains make sure that the

line voltage range marked on the power supply agrees with your

local supply.

The unit must not be operated in explosion endangered environ-

ments!

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.

 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.

INT-COM-1300 / page 2

2 Getting Started Quickly

2 Getting Started Quickly

This section is intended to provide information how to set up quickly the

INT-COM-1300. More details and advanced features are described in further

sections.

2.1 Unpacking

The INT-COM-1300 Common Path OCT Interferometer consists of the following

items:

• INT-COM-1300 Common Path OCT Interferometer

• Power supply (±12V, 0.2A), 110V or 230V line voltage

• Operation manual

NOTE

Please check prior to operation, if the indicated line voltage range on the

power supply matches with your local mains voltage!

NOTE

If you want to use your own power supply, you can ask Thorlabs for an

appropriate power connector cable.

2.2 Setup

• Carefully unpack the unit and accessories. If any damage is noticed, do not

use the unit. Call Thorlabs and have us replace the defective unit.

• If necessary, mount the unit on your optical table or application. The unit has

four tapped 6-32 mounting holes (see section 3.5 for details).

• Plug the power connector cable into the DC INPUT.

• Plug the power supply into a 50-60Hz, 100-120VAC outlet (220V-240VAC for

EC version).

• Use coaxial cables with SMA connectors for OUTPUT.

INT-COM-1300 / page 3

2 Getting Started Quickly

2.3 First Operation

• Please note, that all fiber connectors must have a FC/APC connector!

• Connect a swept laser source to 1300nm IN.

• If necessary, connect a 660nm aiming laser to 660nm IN.

• Connect your Common Path interferometer probe to PROBE.

• Connect an external variable optical attenuator (VOA) to VOA IN and

VOA OUT.

• Adjust the external VOA to suppress any DC component in the interference

signal.

• The maximum OUTPUT voltage swing is ±3.6 V for high impedance loads
(±1.8V for 50Ω loads). The OUTPUT signal should not exceed this maximum

output voltage to avoid saturation.

NOTE

Clean all connectors before plug-in into the module. Please make sure,

that used connector type is FC/APC.

NOTE

To prevent saturation of the amplifier keep the optical input powers less

than the saturation power listed in specification.

 Attention 

Refer to the specification and pay attention to the optical damage

threshold!

Exceeding these values will permanently destroy the detectors!

INT-COM-1300 / page 4

3 Detailed Description

3 Detailed Description

3.1 General Principle of Operation

The Thorlabs INT-COM-1300 Common Path OCT Interferometer is a subassembly to

be used in swept source Fourier domain OCT systems and other applications. It

contains a fusion coupler / circulator network to operate with an external Common

Path interferometer probe. The integrated balanced detector similar to Thorlabs

PDB145C is used for detection of the generated interference fringes. The used fusion

couplers are optimized for flat wavelength response and very low PDCR (polarization

dependent coupling ratio change) to make the signal nearly independent of input

polarization changes. An additional aiming laser input simplifies the optical alignment

of the probe.

The INT-COM-1300 is powered by the included external power supply (±12V,

200mA) via a PICO M8 power connector.

Figure 1 shows a functional block diagram of the INT-COM-1300 Common Path OCT

Interferometer.

Figure 1: Functional block diagram of the INT-COM-1300

WDM

PROBE

VOA IN

Circulator

Slope Compensation

95/5

660 nm IN

OUTPUT

1300 nm IN

WDM

Circulator

DC INPUT

VOA OUT

PROBE

VOA IN

Slope Compensation

95/5

660 nm IN

1

2

1300 nm IN

3

VOA OUT

OUTPUT

DC INPUT

INT-COM-1300 / page 5

3 Detailed Description

3.2 Optical Input and Output, Fiber Network

The INT-COM-1300 Common Path OCT Interferometer subassembly is equipped

with five FC/APC adaptors to be connected to your application. Corning SMF28TM

single mode fiber is used for fusion couplers and internal fiber network.

NOTE

FC/APC connectors must be used for all INPUT and OUTPUT connectors.

Carefully clean the connectors prior to connection.

The internally fiber network is designed for swept source Fourier domain OCT

systems that require a common path interferometer configuration. The probe

interfaced with this module should have a reference arm and a sample arm. The

reflections from both arms are combined to produce the interference fringes. This

signal is detected by the balanced detector integrated into the INT-COM-1300

subassembly. The second input of the balanced detector is used to compensate the

DC component in the interference signal. This requires a variable optical power at the

second input of the balanced detector. An external VOA is used for this purpose.

The input signal from OCT source is split using a 95/5 TAP coupler. 95% of the light

is transmitted to a circulator (port 1). Port 2 of the circulator is connected to a WDM

coupler which combines the signals of the OCT source and the aiming laser. The

output of the WDM coupler is connected to PROBE port. Back reflected light passes

the WDM coupler again and leaves the circulator at port 3, which is connected to one

input of the balanced detector. The tapped 5% of the OCT input signal is passed

through a slope compensation coupler to the VOA. This additional coupler is

necessary to compensate the wavelength dependent coupling ratio change of the

95/5 TAP coupler. TAP coupler and slope compensation coupler are selected in pairs

in order to get a VOA IN signal nearly independent from OCT laser wavelength. This

provides a broadband DC offset compensation.

Typical insertion loss from 1300nm IN to PROBE is less than 1.5dB including
connector losses. Insertion loss from 1300nm IN to VOA IN is about 17dB. The
typical insertion loss for the aiming laser signal between 660nm IN and PROBE is

about 2dB including connector losses. Please note that SMF 28 is not single-mode at

aiming laser wavelength. The coupling of the aiming laser into the module can be

improved by changing the mode distribution moving the aiming laser input fiber.

Specially designed fusion couplers are used to achieve flat wavelength response for

both the PROBE and the VOA IN signals. Furthermore, fusion couplers are selected

INT-COM-1300 / page 6

3 Detailed Description

to get the OUTPUT signal nearly independent to input polarization changes. Figure 2
and Figure 3 show the typical spectral behavior of the INT-COM-1300 measured
from 1300nm IN to PROBE port and from 1300nm IN to VOA IN port.

1200 1250 1300 1350 1400

0

20

40

60

80

100

1300nm IN --> PROBE (%)

Wavelength (nm)

Figure 2: INT-COM-1300 coupling ratio from 1300nm IN to PROBE

1200 1250 1300 1350 1400

0

1

2

3

4

1300nm IN --> VOA IN (%)

Wavelength (nm)

Figure 3: INT-COM-1300 coupling ratio from 1300 IN to VOA IN

For optimal operation of the balanced detector the optical path length of the two input

channels should be matched. Therefore the optical path length from VOA IN to
VOA OUT port (including the VOA) should be twice as long compared to the optical

INT-COM-1300 / page 7

3 Detailed Description

path length from PROBE port to sample. An additional optical delay line may be
inserted between VOA IN and VOA OUT for fine tuning the path length difference.

Please note, that the INT-COM-1300 can also operate outside the specified

wavelength range. It will generate expedient output signals, but specification cannot

be guaranteed.

INT-COM-1300 / page 8

3 Detailed Description

3.3 Electrical Output

The INT-COM-1300 has an OUTPUT SMA connector carrying the detected OCT

fringe signal.

This OUTPUT delivers an output voltage proportional to the difference between the

balanced detector’s two optical input signals (i.e. difference between the photo

currents of both photo detectors), which is amplified by an ultra low noise, high-speed

transimpedance amplifier. The amplifier’s transimpedance gain is 51x103V/A (into

high impedance loads) resp. 25.5x103V/A into a 50Ω load. The maximum output

voltage swing of OUTPUT is ±3.6V (high impedance load) resp. ±1.8V into 50Ω.

The output signal must not exceed the maximum output voltage to avoid saturation.

Therefore, the difference between the optical input power at PROBE and VOA OUT
must not exceed 70µW. It can be estimated from the OCT laser power (1300nm IN)

with respect to external probe losses and sample reflectivity.

The 3dB bandwidth of the OUTPUT signal is limited to 15MHz. Figure 4 shows a
typical frequency response curve of INT-COM-1300 OUTPUT signal. For this
measurement a test signal was applied to VOA OUT port.

0 102030405060

-30

-20

-10

0

10

20

30

40

Amplitude (dB)

Frequency (MHz)

Figure 4: INT-COM-1300 OUTPUT frequency response

The balanced detector includes an active filter section to suppress the generation of

aliasing frequencies in the digitized fringe signal, which would degrade the quality of

the OCT image. The active filter is designed for a sample rate of 50Msample/sec.

Signal frequencies beyond 25MHz are suppressed by more than 20dB. For different

INT-COM-1300 / page 9

3 Detailed Description

sample rates, the filter design can be modified accordingly - please contact Thorlabs

GmbH for details.

Figure 5 shows typical noise spectrum at OUTPUT of INT-COM-1300 measured

using an electrical spectrum analyzer (resolution bandwidth 10 kHz, video BW 3kHz).

The optical inputs of the INT-COM-1300 were darkened during measurement. The

lower curve is measured with INT-COM-1300 switched off , i.e., it represents the

measurement system’s noise floor.

10 20 30 40 50 60

-100

-95

-90

-85

-80

-75

-70

Reference
INT-COM-1300

Power (dBm)

Frequency (MHz)

Figure 5: INT-COM-1300 spectral noise measurement

INT-COM-1300 has a minimum noise-equivalent power (NEP) of 3.2pW/√Hz (DC-

15MHz). The integrated noise over this frequency range (DC-15MHz) is 13nW

RMS

.

This input optical noise level is approximately the minimum optical signal that can be

detected. For INT-COM-1300, the overall output voltage noise (V

RMS

) across a

50Ohm load is 0.32mV

RMS

.

INT-COM-1300 / page 10

3 Detailed Description

3.4 Detector Responsivity

INT-COM-1300 uses InGaAs PIN photodiodes. Figure 6 shows a typical responsivity

curve for this photodiode type.

800 1000 1200 1400 1600 1800

0,0

0,2

0,4

0,6

0,8

1,0

Responsivity (A/W)

Wavelength (nm)

Figure 6: INT-COM-1300 detector responsivity

This wavelength dependency affects the output signal amplitude. In order to

compensate this responsivity, the measured electrical signal must be multiplied by

the normalized wavelength dependent responsivity.

INT-COM-1300 / page 11

3 Detailed Description

3.5 Mounting the INT-COM-1300

The INT-COM-1300 is housed in a rugged 120x80x21mm shielded aluminum

enclosure. The unit can be mounted to small edges by 6-32 screws, see Figure 7.

Threads are of 6 mm depth.

Figure 7: Possible mounting points for INT-COM-1300

An alternative cover with four mounting holes or a customized cover can be ordered

on request, see Figure 8.

Figure 8: INT-COM-1300 with alternative cover

INT-COM-1300 / page 12

3 Detailed Description

3.6 Basic Measurement Setup

This section is dedicated to INT-COM-1300 Common Path OCT Interferometer basic

setup in a swept source Fourier domain OCT system, see Figure 9. A swept laser is

connected to 1300nm IN while an red aiming laser is connected to 660nm IN. OCT

fringe signals are recorded to a Data Acquisition Device connected to OUTPUT. A

common path interferometer probe is connected to PROBE and a variable optical
attenuator (VOA) is connected between VOA IN and VOA OUT.

Probe

Circulator

Slope Compensation

WDM

95/5

Aiming

laser

OCT
laser

Data

Acquisition

Device

VOA

Sample

INT-COM-1300

Probe

Circulator

Slope Compensation

WDM

95/5

Aiming

laser

OCT
laser

Data

Acquisition

Device

Data

Acquisition

Device

VOAVOA

Sample

INT-COM-1300

Figure 9: Basic measurement setup

The VOA is used to adjust for power balance at the balanced detector’s inputs to

remove any DC component in the interference signal. Furthermore in balanced

condition maximum common mode rejection (maximum noise suppression) is

achieved. The VOA setting mainly depends on external Common Path probe loss

and sample reflectivity. The INT-COM-1300 is designed for low reflectivity samples.

For high reflectivity samples it could be necessary to attenuate the back reflected

probe light to achieve power balance at the balanced detector.

To obtain maximum noise suppression across the entire bandwidth of the balanced

detector, equal optical path lengths are also essential. Any path length imbalance will

introduce a phase shift between the two optical signals detected by the balanced

detector which will decrease noise reduction performance. The 95/5 TAP coupler

acts as signal divider for the balanced detection.

INT-COM-1300 / page 13

3 Detailed Description

One optical path is formed from the TAP coupler 95% output through the circulator

and WDM coupler to PROBE port, passing the external Common Path probe towards
the sample, from which the optical signal is back reflected to PROBE port and

passes then the WDM coupler and circulator to one input of the balanced detector.

The other optical path leads from TAP coupler 5% output via the slope compensation

coupler and the external VOA to the second input of the balanced detector. While the

inner path lengths are nearly identical the external path length has to be matched. As

a rule of thumb, the PROBE-to-sample optical path length shall be half of the optical

path length between VOA IN and VOA OUT. The reason is that the probe signal
passes the PROBE-sample distance two times. For fine adjustment of the optical
path length, an additional optical delay line between VOA IN and VOA OUT should

be inserted, alternatively, the distance between probe and sample should be

adjusted.

In perfect balance condition, i.e. equal input powers and equal optical path lengths, a

common mode rejection ratio (CMRR) > 35dB across the entire bandwidth of the

balanced detector is achievable. With path length imbalances high CMRR values are

achievable in the low frequency region only, while the CMRR value decrease with

increasing frequency. Figure 10 shows the common mode rejection capability in

balanced condition.

0 102030405060

-40

-30

-20

-10

0

10

20

30

40

CMRR

VOA OUT
PROBE
Balance Mode

Amplitude (dB)

Frequency (MHz)

Figure 10: INT-COM-1300 frequency response and common mode rejection ability

INT-COM-1300 / page 14

3 Detailed Description

3.7 Recommendations

It has been observed, that some combinations of FC/APC patch cords and FC

adaptors from different vendors may lead to different insertion loss values. Thorlabs

is testing insertion loss specification using FC/APC patch cords made by Thorlabs as

well as made by Diamond. If insertion loss of the INT-COM-1300 seems to be too

high (higher than listed in specification), please try another FC/APC patch cord

and/or adapter combination.

It is not recommended to remove FC adaptors to clean the inner FC/APC connectors.

Do not try to open the unit. If you suspect a contaminated connector please contact

Thorlabs GmbH for a solution.

Although the OUTPUT signal is nearly independent to input polarization changes, a

stable input polarization during measurement is recommended in order to increase

accuracy. Fixing the input fiber to the optical table surface is sufficient in most cases.

Please note, that the INT-COM-1300 can also operate outside the specified

wavelength range. It will generate expedient output signals, but Specifications cannot

be guaranteed.

It is not necessary to switch off aiming laser during measurement. The aiming light

will not affect the measurement. It is blocked by the WDM coupler and the circulator.

Furthermore, the wavelength of aiming light is far below the detectors’ operating

wavelength range.

The aiming laser’s wavelength may differ from 660nm. Lasers operating at 635nm as

well as other visible laser sources are suitable, but a maximum coupling efficiency

due to the WDM coupler is reached at 660nm. Lasers with multimode pigtail can be

used, at a remarkably increased insertion loss from 660nm IN to PROBE in this case.

INT-COM-1300 / page 15

4 Maintenance and Repair

4 Maintenance and Repair

 Attention 

Do not try to open the power supply or the unit! Dangerous or even

lethal voltages inside.

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

4.1 General Care

Protect the INT-COM-1300 from adverse weather conditions. The INT-COM-1300 is

not water resistant.

4.2 Cleaning

To clean the INT-COM-1300 housing, use a mild detergent and damp cloth. Do not

soak the unit in water or use solvent based cleaners.

It is not recommended to remove FC adaptors to clean the inner FC/APC connectors.

If you suspect a contaminated connector please contact Thorlabs GmbH for a

solution. When cleaning FC/APC connectors, please remember that these are

sensitive optical devices. Wipe gently with an optic tissue wetted with propane or use

a commercial optical fiber connector cleaner.

 Attention 

To avoid damage, do not remove the FC adaptors and do not try to

open the unit!

INT-COM-1300 / page 16

4 Maintenance and Repair

4.3 Repair

There are no serviceable parts in the INT-COM-1300 or power supply. The INT-

COM-1300 does not contain any components to be repaired by the user. If any

malfunction should occur or you suspect a problem, please contact Thorlabs GmbH

for repair return instructions.

INT-COM-1300 / page 17

5 Appendix

5 Appendix

5.1 Technical Data

Specification INT-COM-1300

Optical Parameters

Wavelength Range 1250 - 1350nm

Fiber Type Corning SMF28

TM

Optical Connectors FC/APC

Insertion Loss*

1300nm IN to PROBE

< 1.5dB typical

2.3dB max.

Insertion Loss*

1300nm IN to VOA

< 17dB typical

20dB max.

Insertion Loss*

660nm IN to PROBE

< 2dB typical

4dB max.

Max. Input Power 1300nm IN

250mW

Electrical Parameters

Detector Material/Type InGaAs / PIN

Detector Wavelength Range 800 - 1700nm

Typical Max. Responsivity 1.0A/W

OUTPUT Bandwidth (3dB)

DC - 15MHz

Transimpedance Gain 51* 10³V/A

Saturation Power** 70µW

Max. Input Power**
(photodiode damage threshold))

20mW

Electrical Outputs, Impedance SMA, 50Ω

DC-offset Electrical Outputs

< ± 5mV

Others

Size 120x80x21mm³

Power Supply

±12V, 200mA

All accuracy data are valid at 23 ± 5°C and 45 ±15% humidity
* includes connector losses, measured at center wavelength
** referred to PROBE and VOA OUT port in this case

INT-COM-1300 / page 18

5 Appendix

5.2 Mechanical Drawing

INT-COM-1300 / page 19

5 Appendix

5.3 Warranty

Thorlabs GmbH warrants material and production of the INT-COM-1300 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 bears the

shipping costs to Thorlabs GmbH , in case of warranty repairs Thorlabs GmbH will

pay for return shipment back to the customer.

If no warranty repair is applicable the customer bears the costs for return shipment

as well.

In case of shipment from outside EU applying customs fees, taxes etc. shall be paid

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 faulty 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 conditions stated by us or unauthorized

maintenance.

Further claims will not be consented to and will not be acknowledged. Thorlabs

GmbH does explicitly not warrant the usability 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.

INT-COM-1300 / page 20

5 Appendix

5.4 Certifications and Compliances

Certifications and compliances

Category Standards or description

EC Declaration
of Conformity ­EMC

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

EN 61326 EMC requirements for Class A electrical equipment

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

1

and Immunity.

2

IEC 61000-4-2 Electrostatic Discharge Immunity (Performance

criterion C)

IEC 61000-4-3 Radiated RF Electromagnetic Field Immunity

(Performance criterion B)

2

Complies with the Radiocommunications Act and demonstrated per EMC
Emission standard

1,2,3

:

AS/NZS 2064 Industrial, Scientific, and Medical

Equipment: 1992

Australia /
New Zealand
Declaration of
Conformity ­EMC

FCC EMC
Compliance

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

1

.

1

Using high-quality shielded interface cables.

2

Minimum Immunity Test requirement.

INT-COM-1300 / page 21

5 Appendix

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

11

)

•

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.).

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

your nearest dealer for further information.

5.5.1 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.

INT-COM-1300 / page 22

5 Appendix

5.5.2 Ecological background

It is well known that WEEE 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 live products will thereby avoid negative impacts on the

environment.

Figure 11: Crossed out “wheelie bin” symbol

INT-COM-1300 / page 23

5 Appendix

5.6 List of Figures

Figure 1: Functional block diagram of the INT-COM-1300 ......................................... 5

Figure 2: INT-COM-1300 coupling ratio from 1300nm IN to PROBE......................... 7

Figure 3: INT-COM-1300 coupling ratio from 1300 IN to VOA IN ............................... 7

Figure 4: INT-COM-1300 OUTPUT frequency response............................................ 9

Figure 5: INT-COM-1300 spectral noise measurement............................................ 10

Figure 6: INT-COM-1300 detector responsivity........................................................ 11

Figure 7: Possible mounting points for INT-COM-1300............................................ 12

Figure 8: INT-COM-1300 with alternative cover ....................................................... 12

Figure 9: Basic measurement setup......................................................................... 13

Figure 10: INT-COM-1300 frequency response and common mode rejection ability 14

Figure 11: Crossed out “wheelie bin” symbol............................................................ 23

5.7 List of Acronyms

The following acronyms are used in this manual:

CMRR Common Mode Rejection Ratio

NEP Noise-equivalent Power

OCT Optical Coherence Tomography

PDCR Polarization Dependent Coupling Ratio

VOA Variable Optical Attenuator

INT-COM-1300 / page 24

5 Appendix

5.8 Addresses

Our company is also represented by several distributors and sales offices throughout

the world.

Europe

Thorlabs GmbH

Hans-Boeckler-Str. 6

D-85221 Dachau / Munich

Germany

Sales and Support

Phone: [phone] / 5956-0

Fax: [phone] / 5956-99

Email: [e-mail]
Web: www.thorlabs.com

USA

Thorlabs, Inc.

435 Route 206 North

Newton, NJ 07860

USA

Sales and Support

Phone: [phone]

Fax: [phone]

Email: [e-mail]
Email: [e-mail]
Web: www.thorlabs.com

INT-COM-1300 / page 25

5 Appendix

Japan

Thorlabs, Inc.

6th Floor, Fujimizaka Building

5-17-1, Ohtsuka

Bunkyo-ku, Tokyo 112-0012

Japan

Sales and Support

Phone: [phone]

Fax: [phone]

Email: [e-mail]
Web: www.thorlabs.jp

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

our homepage

http://www.thorlabs.com

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