THORLABS LLD1530 User manual

LLD1530
Frequency-Locked Laser
User Guide

Frequency-Locked Laser
Table of Contents
Chapter 1Warning Symbol Definitions..............................................................................................1
Chapter 2Safety....................................................................................................................................2
Chapter 3Specifications......................................................................................................................3
3.1.Specification Tables........................................................................................................3
3.2.Graphs..............................................................................................................................5
Chapter 4Controls and User Interface...............................................................................................7
4.1.Front Panel Features....................................................................................................... 7
4.2.Back Panel Features .......................................................................................................8
4.3.Digital I/O..........................................................................................................................9
Chapter 5Operation.............................................................................................................................10
5.1.Description.....................................................................................................................10
5.2.Start-Up Procedure .......................................................................................................11
5.3.Automatic and Manual Modes of Operation ............................................................... 11
5.4.Disabling the Laser .......................................................................................................12
5.5.Warm Up and Stability ..................................................................................................12
5.6.Laser Safety Interlock ...................................................................................................12
Chapter 6General remarks.................................................................................................................13
6.1.Use of the Equipment ...................................................................................................13
6.2.Maintenance and Repair ............................................................................................... 13
Chapter 7Mechanical Drawing...........................................................................................................14
Chapter 8Troubleshooting.................................................................................................................15
Chapter 9Regulatory...........................................................................................................................16
Chapter 10Declaration of Conformity.................................................................................................17
Chapter 11Thorlabs Worldwide Contacts..........................................................................................18

Frequency-Locked Laser Chapter 1: Warning Symbol Definitions
Rev A, March 23, 2018 Page 1
Chapter 1 Warning Symbol Definitions
Below is a list of warning symbols you may encounter in this manual or on your device.
Symbol Description
Direct Current
Alternating Current
Both Direct and Alternating Current
Earth Ground Terminal
Protective Conductor Terminal
Frame or Chassis Terminal
Equipotentiality
On (Supply)
Off (Supply)
In Position of a Bi-Stable Push Control
Out Position of a Bi-Stable Push Control
Caution: Risk of Electric Shock
Caution: Hot Surface
Caution: Risk of Danger
Warning: Laser Radiation
Caution: Spinning Blades May Cause Harm

Frequency-Locked Laser Chapter 2: Safety
Page 2 STN050884-D02
Chapter 2 Safety
WARNING
Wavelength ~1.53 µm
Maximum Output Power < 10 mW
Beam Divergence ~ 0.2 rad
The classification of this laser follows the European Standard IEC 60825-1:2014.
Viewing the laser output with telescopic optical instruments (for example, telescopes and binoculars) close to
the aperture may pose an eye hazard! Using the instrument in combination with collimating optics may have
an impact on the assigned laser classification. The safety of any system incorporating the equipment is the
responsibility of the assembler of the system.
Use of controls or adjustments or performance of procedures other than those specified herein may result in
hazardous radiation exposure. There are no user-serviceable parts inside the instrument – never remove the
red cover from the instrument.
WARNING
Do not open the instrument. Risk of electric shock. Please use the instrument only in combination with the
included power chord and make sure that a connection to earth ground is given.
WARNING
If the equipment is used in a manner not specified by the manufacturer,
the protection provided by the equipment may be impaired. Do not load the top of the instrument with weight.
The instrument contains less than 10 ml of C2H2at a pressure of 2 Torr.
WARNING
Do not cover the fan grill on the back of the instrument.
CAUTION
This instrument should be kept clear of environments where liquid spills or condensing moisture are likely.
The LLD1530 frequency-locked laser is not water resistant. To avoid damage to the instrument, do not
expose it to spray, liquids, or solvents.

Frequency-Locked Laser Chapter 3: Specifications
Rev A, March 23, 2018 Page 3
Chapter 3 Specifications
3.1. Specification Tables
Performance Specifications
Parameter Min Typ. Max Unit Notes
Center Vacuum Wavelength 1532.8323 nm
Stability (Long Term)
- < ±10 ±25 MHz
After Warm Up1
- < ±0.08 ±0.2 pm
- < ±0.00033 ±0.00085 cm-1
Accuracy (at Start Up)
- < ±15 ±25 MHz
- < ±0.12 ±0.2 pm
- < ±0.00050 ±0.00085 cm-1
Precision (at StartUp)
- < 1 -- MHz
After Warm Up and for
Constant Environmental
Conditions
- < 0.008 - pm
- < 0.00003 - cm-1
Laser Linewidth (FWHM) - <3 - MHz
Found by measuring the
beat note between two
locked LLD1530 lasers
over a 10 µs duration.
Side Mode Suppression
Ratio (SMSR) 35 - - dB
Relative Intensity Noise
(RIN) - 100 - dBc/Hz
20 MHz Measurement
Bandwidth, 200 ms
Signal Acquisition
Optical Power Stability - 1.1 - % 30 minute Duration
Optical Output Power - - 10 mW IEC 60825-1:2014
Max Change in Ambient
Temperature before
Frequency Re-Lock
Needed2
T = ±3.5 °C
Ambient Temperature
Change Triggering
Frequency Re-Lock3
T = ±(0.9)*3.5 °CAUTO Mode Only
Laser Class4Class 1
Optical Fiber Type SMF-28 Ultra
1Variations in the instrument’s temperature are the main source of wavelength drift. Maintaining operation within specifications requires re-
locking the laser wavelength after a temperature change of 3.5 °C. Re-locking events are triggered automatically when operating in AUTO
mode, and an LED on the front panel indicates the need to re-lock when operating in MANUAL mode.
2When operating in MANUAL Mode, the LOCKED staus LED will be extinguished when the temperature change exceeds these limits. The
performance specifications given above will not apply if the LOCKED status LED is not illuminated. When operating in AUTO mode, the
instrument's frequency will be automatically re-locked before these limits are reached.
3In MANUAL mode, the RELOCK NEEDED status LED illuminates when these limits are exceeded. If the RELOCK NEEDED status LED is
illuminated, the performance specification given above will not apply. In AUTO mode, external disturbances that cause loss of frequency
locking also trigger a re-lock procedure.
4Collimation optics are not recommended for use with this laser, as their use may result in the emission limit for Class 1 laser products being
exceeded.

Frequency-Locked Laser Chapter 3: Specifications
Page 4 STN050884-D02
Connectors
Parameter Value
Optical Fiber Connector FC/APC
Digital control interface D-Sub 9 pin Female
Environmental and Power Specifications
Parameter Value
Operating Temperature Range510 °C - 40 °C
Storage Temperature Range 0 °C - 60 °C
Power requirements 100 - 240 VAC, 0.3 A, 50 - 60 Hz
Fuse 0.5 A, 250 V, Type T, 5 x 20 mm
Maximum Operating Altitude 2000 m Above Sea Level
5Non Condensing

Frequency-Locked Laser Chapter 3: Specifications
Rev A, March 23, 2018 Page 5
3.2. Graphs
Figure 1 The top plot shows the typical variation in the LLD1530's vacuum emission wavelength
over one hour. Frequency stability data were measured using two LLD1530 lasers and a beat note
approach; one LLD1530 was intentionally operated with a slightly detuned optical frequency to
generate the beat note. The frequency measurements were converted to wavelength for the plot.
The data in the bottom plot were measured using Thorlabs' OSA205C and show the typical long-
term vacuum wavelength stability of the LLD1530. All data were acquired while the lasers
operated in MANUAL Mode under ambient conditions. No re-locking procedures were performed
during data acquisition.

Frequency-Locked Laser Chapter 3: Specifications
Page 6 STN050884-D02
Figure 2 Plot showing a typical side mode suppression ratio (SMSR) of the DFB laser integrated
into the LLD1530 laser reference system.
Figure 3 Typical beat note spectrum between two LLD1530 frequency-locked laser sources (blue
curve), plotted with a Lorentzian curve fit (red curve). The beat note was recorded over 10 µs
using a 150 MHz detector. A 2.5 MHz FWHM linewidth was derived from the measurement data and
the 3.6 MHz FWHM of the curve fit.

Frequency-Locked Laser Chapter 4: Controls and User Interface
Rev A, March 23, 2018 Page 7
Chapter 4 Controls and User Interface
The front and back panels of the instrument include instrument status indicators, controls, optical output ports and
a digital I/O interface. The locations and functionality of these features are described in the following.
WARNING
Caution – Use of controls or adjustments or performance of procedures other than
those specified within this manual may result in hazardous radiation exposure!
4.1. Front Panel Features
Label Function
F1 LED Indicates Power is Supplied to Unit
F2 LED Indicates Laser Frequency is Locked within ±25 MHz Range
F3 LED Indicates Laser Frequency is Near the Edge of the ±25 MHz Range
F4 Button to Trigger Laser Re-Lock Procedure
(Enabled in Manual Mode Only)
F5 Key Switch Provides Power to the Unit
F6 LED Indicates Operation in Automatic Mode
F7 LED Indicates Operation in Manal Mode
F8 Button to Switch between Automatic and Manual Modes
F9 Laser Emission Output Aperture, FC/APC Connector
F10 Button to Enable Laser Emission
F11 LED Indicating Laser is On and Laser Emission Present
F1
F2
F3
F4
F5
F6
F7 F8
F9
F11
F10
INVISIBLE LASER
RADIATION EMITTED
FROM THIS APERTURE

Frequency-Locked Laser Chapter 4: Controls and User Interface
Page 8 STN050884-D02
4.2. Back Panel Features
Label Function
B1 Laser Interlock Jack
B2 Digital I/O Interface, Female DB9 Connector
B3 AC Power Cord Connector
B1
B2
B3

Frequency-Locked Laser Chapter 4: Controls and User Interface
Rev A, March 23, 2018 Page 9
4.3. Digital I/O
The D-Sub 9 Pin female DIGITAL I/O interface on the rear panel can be used to operate and receive operating
status information from the LLD1530. Interfacing with the instrument via this digital I/O port requires the LLD1530
to be powered on. This is done by connecting the instrument to mains power and turning the key in the key switch
to position I. When the instrument is powered, the POWER ON LED is illuminated.
The pin configuration is described in the table below. The interface inputs can be activated by setting pin 1 to low
(GND). As long as the signal on pin 1 is LOW, all buttons on the front panel are disabled, and the instrument
can be controlled solely by the digital inputs on the rear panel. All LEDs on the front panel; however, continue to
indicate the current state of the instrument. Pins 4 through 6 on the rear panel also provide status information.
Pin Function State Type
LOW (GND) HIGH (5V)
1Enable Laser ENABLED DISABLED Input
26Trigger Relock RELOCK -- Input
3Select Operating Mode MANUAL AUTO Input
4System Status Indicator RELOCK NEEDED Output
5System Status Indicator LOCKED Output
6System Status Indicator LASER ON Output
7Not Connected
8Not Connected
9GND
6To initiate the relocking procedure, set this pin Low for at least 100 ms, but not longer than 1 s. Otherwise, keep this pin high.

Frequency-Locked Laser Chapter 5: Operation
Page 10 STN050884-D02
Chapter 5 Operation
CAUTION
This instrument should be kept clear of environments where liquid spills or condensing moisture are likely.
The LLD1530 locked frequency laser is not water resistant. To avoid damage to the instrument, do not
expose it to spray, liquids, or solvents.
5.1. Description
Thorlabs' LLD1530 Frequency Locked Reference Laser is a laser-diode-based, turnkey system with a vacuum
emission wavelength of 1532.8323 nm. The distributed feedback (DFB) laser at the heart of the LLD1530 has a
<3 MHz linewidth and a high side mode suppression ratio (SMSR) of at least 35 dB. The laser frequency is actively
stabilized to a National Institute of Standards and Technology (NIST)-traceable molecular transition of acetylene
(C2H2). The LLD1530 provides a laser emission frequency at start-up within ±25 MHz of the target operating
frequency, regardless of where within its 30 °C temperature operating range the instrument is powered on and
frequency locked. This is accomplished by Thorlabs’ sophisticated start-up algorithm and the design of the gas cell
parameters, which were chosen to ensure the low influence of temperature fluctuations on the output frequency.
The emission frequency immediately after start-up is then maintained with a ±25 MHz stability, providing an overall
frequency accuracy of ±50 MHz. The LLD1530 is a convenient and high-performance source for demanding FTIR
system, instrument calibration, gas sensing, and coherent telecommunications instrumentation.
Re-locking procedures may be required, not because of any gas cell behavior, but because other components in
the LLD1530 exhibit modest temperature-dependent optical properties. The re-locking procedure, which in AUTO
mode is automatically triggered when needed, easily compensates for these. When operating in MANUAL mode,
the LLD1530 will prompt the user to trigger the re-locking procedure but will not perform them automatically.
We recommend operating in AUTO mode, in which the laser emission frequency is stabilized to within ±25 MHz of
the laser emission frequency immediately following the most recent frequency locking procedure. In AUTO mode,
the system automatically triggers a frequency re-locking procedure when the laser emission frequency drifts by an
amount close to, but less than, 25 MHz. For more information about the threshold that triggers the frequency re-
lock, see Chapter 3 and Section 5.3. The RELOCK button is not enabled in AUTO mode.
MANUAL mode is intended to be used when a task is intolerant of the variations in the intensity and wavelength
that occur during the re-locking procedure. The user may toggle between AUTO and MANUAL modes using a
button on the front panel. When operating in MANUAL mode, the red RELOCK NEEDED LED illuminates at the
threshold that would trigger a frequency re-locking procedure in AUTO mode. When the emission frequency drifts
more than 25 MHz from the frequency of the laser emission immediately following the most recent frequency locking
procedure, the "LOCKED" LED is extinguished. The LLD1530 will continue to operate, but the specified frequency
accuracy cannot be guaranteed when the RELOCK NEEDED LED is illuminated. When the laser operates in
MANUAL mode, the user may initiate the frequency re-locking procedure at any time by pressing the RELOCK
button.
The system provides the optical output via an FC/APC connector on the front panel. The female DB9 connector on
the back panel offers a digital I/O interface that enables the user to select the operating mode and trigger the
frequency re-locking procedure, as well as obtain operating status information.

Frequency-Locked Laser Chapter 5: Operation
Rev A, March 23, 2018 Page 11
5.2. Start-Up Procedure
The LLD1530 is powered up in the following way. Please reference the labeled front panel features in Section 4.1:
1. Turn on the system by turning the POWER key (F5); the POWER-ON LED (F1) will indicate that the system
is powered. Turning on the system does not enable laser emission.
2. Press the ENABLE button (F10) to turn on the laser. After approximately 2 s, the laser turns on and the
LASER-ON LED (F11) illuminates to indicate that light is being emitted from the LASER APERTURE (F9).
The system will automatically lock the laser frequency to that of a molecular transition in C2H2, which takes around
15 seconds in most cases7. The LOCKED LED (F2) will indicate when the procedure is finished and the system is
ready to use.
5.3. Automatic and Manual Modes of Operation
Care has been taken to minimize temperature-related drifts of the LLD1530 output wavelength. However, changing
environmental conditions, for example due to an increase in system temperature resulting from extended period of
operation, may cause the frequency to drift outside of the specified ±25 MHz frequency range. The relationship
between laser frequency and temperature has been well characterized, and changes in the ambient temperature
are monitored to determine when it is necessary to execute a frequency re-locking procedure in order to maintain
operation within specifications. When the ambient temperature changes ±3.5 °C from the temperature at which the
laser was last frequency locked, the laser frequency has drifted up to ±25 MHz. This is the boundary of the specified
range around the target frequency.
The LLD1530 allows the user to choose how the instrument should respond when the frequency nears the edge of
the specified frequency range by offering two operational modes, AUTO and MANUAL. The preferred mode of
operation can be selected by pressing the MODE switch button (F10). The LEDs (F6 and F7) above the mode
switch button indicate the current mode of operation. The mode may be changed whenever desired, including any
time after the laser has been enabled.
While the instrument operates in automatic mode, the frequency re-locking procedure is triggered after the
temperature of the instrument has changed by 90% of ±3.5 °C, or after an external disturbance causes the frequency
locking to be lost. The RELOCK control (F4) is disabled during operation in automatic mode. The re-locking
procedure typically completes in 15 seconds.
When the instrument operates in manual mode, the RELOCK NEEDED LED (F3) will illuminate after the
temperature of the instrument has changed by 90% of ±3.5 °C. This LED indicates the temperature has changed
by enough since the last locking event that the frequency is close to exiting the specified range, and that re-locking
the laser frequency is necessary to maintain operation within specifications. Pressing the RELOCK button (F4) will
trigger the re-locking procedure. If the temperature changes by ±3.5 °C, the LOCKED LED is extinguished.
Operation in the manual mode can benefit experiments in which it would be detrimental for the laser emission to be
interrupted, or when the application is intolerant of the “wavelength steps” that occur during the re-locking process.
However, if the RELOCK NEEDED LED (F3) is illuminated, the specified frequency accuracy cannot be guaranteed.
Regardless of the mode of operation, the LOCKED (F2) LED is extinguished while the re-locking procedure
executes. The LOCKED LED will illuminate again after the re-locking procedure completes and the output
wavelength is stable. Please refer to Section 5.5 for more information on the stability of the instrument.
WARNING
Note that invisible laser radiation is emitted even during a re-lock event!
7In rare cases when the LLD1530 is disturbed by mechanical or thermal influences the lock procedure can take up to around a minute or until
the system is undisturbed again.

Frequency-Locked Laser Chapter 5: Operation
Page 12 STN050884-D02
5.4. Disabling the Laser
After the laser has been powered and enabled, it can be disabled at any time by pressing the ENABLE button (F10).
When the laser is disabled, the DFB laser inside the LLD1530 is turned off and hence the frequency lock will be
lost. When the laser is enabled again, by pressing the ENABLE button, the lock of the laser frequency to the
molecular transition has to be re-established (as described in Section 5.2). At all times, the LASER ON (F11) and
LOCKED (F2) LEDs indicate the current status of the instrument.
5.5. Warm Up and Stability
For best output wavelength stability please allow the LLD1530 to warm up for approximately 20 minutes with the
laser enabled. This helps to stabilize the temperature inside the instrument. We recommend you then perform a re-
lock of the instrument’s frequency. This is done by pressing the RELOCK button (F4) if operating in MANUAL mode,
or by disabling and enabling the laser using the ENABLE button (F10) if operating in AUTO mode. In both cases,
the laser will execute a re-locking procedure that will ensure the it is operating with the start-up accuracy specified
in Section 3.1. Whenever you need the most accurate wavelength reading in your experiment, we recommend you
to re-lock the instrument for best accuracy.
However, please note that if the RELOCK-NEEDED LED (F3) is extinguished, the instrument operates with the
accuracy specified in Section 3.1. This is true even immediately after the system is powered on.
5.6. Laser Safety Interlock
The laser is equipped with a phono-type interlock jack located on the back panel. To enable the laser source, a
short circuit (< 430 Ω) must be applied across the terminals of the interlock connector. The shorting device (interlock
pin) installed in all units shipped from Thorlabs performs this function. Leave the shorting device installed unless
using an external safety circuit or other type of remotely controlled switch to enable laser output.
Making use of the Interlock feature requires the appropriate 2.5 mm phono-type plug, which is diagrammed in the
figure below and is readily available through most electronics retailers. The plug should be wired to the external
safety circuit or switch and then plugged into the back panel’s interlock jack in place of the shorting device. The
electrical specifications of the interlock jack are listed in the following table.
Interlock specifications
Interlock Switch requirements Must be Normally Open Dry Contacts. Apply no External Voltages
to the Interlock Input.
Type of Mating Connector 2.5 mm Mono Phono Jack
Open Circuit Voltage 5 VDC
Short circuit current (typical) 0.5 mA
Diagram of a Phono-Type Plug
Ring
Center Pin

Frequency-Locked Laser Chapter 6: General remarks
Rev A, March 23, 2018 Page 13
Chapter 6 General remarks
6.1. Use of the Equipment
This frequency reference laser source is designed and intended for indoor laboratory use.
6.2. Maintenance and Repair
WARNING
There are no user-serviceable parts inside the instrument – never remove the red cover from the
instrument.
The instrument should not need regular maintenance by the user. If necessary the display, housing, and front panel
can be cleaned using a soft cloth moistened with normal, mild glass cleaner. Do not use any chemical solvents or
harsh cleaners on the display. Do not spray any cleaning solutions directly onto any part of the unit.
The instrument does not contain any modules that can be repaired by the user. If a malfunction occurs, please
contact Thorlabs Technical Support and arrangements will be made to investigate the problem. Do not remove the
cover. There are no user serviceable components inside.
Optical patch cords used to connect to the front panel of the instrument should have their end faces cleaned every
time a new connection is made. The end faces of the internal fiber connectors can easily be damaged by the use
of dirty fiber ends. If damage occurs, the instrument will need to be sent back for repair. We suggest using a fiber
end-face cleaning product such as the Thorlabs FCC-7020 shown below. Alternatively, a lint-free cloth moistened
with isopropyl alcohol or methanol can be used. Never use acetone.
Figure 4 Thorlabs FCC-7020 Fiber Endface Cleaner for Patch Cables
The optical connectors on the front panel may be cleaned using a 2.5 mm bulkhead cleaner such as the Thorlabs
FBC1. This allows the user to clean the fiber end-face without removing it from the internal bulkhead adapter.
Figure 5 Thorlabs FBC1 Fiber Endface Cleaner for Bulkheads

Frequency-Locked Laser Chapter 7: Mechanical Drawing
Page 14 STN050884-D02
Chapter 7 Mechanical Drawing
15.2 mm
(0.6")
299.9 mm
(11.81")
318.2 mm
(2.53")
96.1 mm
(3.78") 104.2 mm
(4.1")
149.8 mm
(5.9")

Frequency-Locked Laser Chapter 8: Troubleshooting
Rev A, March 23, 2018 Page 15
Chapter 8 Troubleshooting
Consulting the following may provide assistance if you experience difficulties with the LLD1530. If you have any
questions, please contact your local Thorlabs Technical Support office.
If the unit does not appear to turn on correctly, please check the following items:
Ensure that the main AC receptacle is powered
Ensure that main power cable is fully seated at both ends
Ensure that the key switch is in the “I” position
Check the main power fuse (see Maintenance and Repair Section)
Observation Explanation / Solution
The ENABLE button does not work /
the LASER ON LED does not
illuminate when the ENABLE button
is pressed.
The LLD1530 has a built-in 2 second slow-start circuit for
ESD protection. Pressing the ENABLE button will activate
the circuit, but light will not be immediately emitted. Light will
be emitted after the 2 second delay, and light emission is
indicated by an illuminated LASER ON LED.
The LOCKED LED has not
illuminated after the laser has been
enabled for at least one minute.
The most common reason for this is that the system has
been disturbed after the ENABLE button has been pressed,
e.g. by mechanical or electronic disturbances.
Another common reason for this is that the laser has been
disabled during a lock procedure. A lock procedure will be
triggered automatically whenever the laser is enabled by
pressing the ENABLE button. If the laser then is disabled
before the LOCKED LED is illuminated (either by pressing
the ENABLE button or by opening the interlock connection),
the lock procedure recognizes this and halts. The lock
procedure will continue after the laser is enabled again.
In both cases, if the LOCKED LED is still not illuminated
after approximately one minute, turn the system off with the
key switch and turn it on again; enable the laser by once
pressing the ENABLE button and wait; the LOCKED LED
should illuminate after ~15 seconds.

Frequency-Locked Laser Chapter 9: Regulatory
Page 16 STN050884-D02
Chapter 9 Regulatory
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 13, 2005
Marked correspondingly with the crossed out “wheelie bin” logo (see right)
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.
Waste Treatment is 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.
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 life products
will thereby avoid negative impacts on the environment.
Wheelie Bin Logo

Frequency-Locked Laser Chapter 10: Declaration of Conformity
Rev A, March 23, 2018 Page 17
Chapter 10 Declaration of Conformity

Frequency-Locked Laser Chapter 11: Thorlabs Worldwide Contacts
Page 18 STN050884-D02
Chapter 11 Thorlabs Worldwide Contacts
For technical support or sales inquiries, please visit us at www.thorlabs.com/contact for our most up-to-
date contact information.
USA, Canada, and South America
Thorlabs, Inc.
s[email protected]
[e-mail]
Europe
Thorlabs GmbH
[email protected]
France
Thorlabs SAS
[email protected]
Japan
Thorlabs Japan, Inc.
[email protected]
UK and Ireland
Thorlabs Ltd.
[email protected]
[e-mail]
Scandinavia
Thorlabs Sweden AB
[email protected]
Brazil
Thorlabs Vendas de Fotônicos Ltda.
[email protected]
China
Thorlabs China
[email protected]