THORLABS LM14S2 User manual

LM14S2
Butterfly Laser
Diode Mount
User Guide

Butterfly Laser Diode Mount
Table of Contents
Chapter 1Warning Symbol Definitions..............................................................................................1
Chapter 2Safety....................................................................................................................................2
Chapter 3Description...........................................................................................................................3
Chapter 4Setup.....................................................................................................................................4
4.1.Setup Instructions...........................................................................................................4
4.2.Configuration Cards........................................................................................................5
4.2.1.Configuration Card Pin-Outs ................................................................................................. 6
4.3.Using the TEC / Laser Lockout Feature ........................................................................7
4.4.Operating the Butterfly Laser Diode..............................................................................7
4.5.Laser Controller Connection..........................................................................................7
4.5.1.Using the Thorlabs LDC Series Laser Controllers ................................................................ 7
4.5.2.Using a Third-Party Laser Controller .................................................................................... 7
4.6.TEC Controller Connection ............................................................................................8
4.6.1.Using the Thorlabs TED200C Controller .............................................................................. 8
4.6.2.Using a Third-Party TEC Controller ...................................................................................... 8
4.7.Grounding ........................................................................................................................8
Chapter 5Operation..............................................................................................................................9
5.1.RF Modulation .................................................................................................................9 
5.2.Status and Interlocks ....................................................................................................10
5.3.Maintaining the LM14S2 ...............................................................................................10
Chapter 6Safety Interlock Connections...........................................................................................11
Chapter 7Troubleshooting.................................................................................................................12
Chapter 8Specifications.....................................................................................................................13
Chapter 9Mechanical Drawing...........................................................................................................14
Chapter 10Appendix..............................................................................................................................15
10.1.NEL Module Type STB ..................................................................................................15
10.2.Two Port Electro-Optic Devices...................................................................................15
Chapter 11Regulatory...........................................................................................................................17
Chapter 12Thorlabs Worldwide Contacts..........................................................................................18

Butterfly Laser Diode Mount Chapter 1: Warning Symbol Definitions
Rev E, May 8, 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

Butterfly Laser Diode Mount Chapter 2: Safety
Page 2 10614-D02
Chapter 2 Safety
WARNING
Always observe proper laser safety when operating this unit.

Butterfly Laser Diode Mount Chapter 3: Description
Rev E, May 8, 2018 Page 3
Chapter 3 Description
The LM14S2 is a universal laser diode mount specifically designed for 14-pin butterfly laser diodes that have
integrated Thermal Electric Coolers (TECs) and Thermistor sensors. When used with Thorlabs LDC Series Laser
Controllers and TED Series TEC Controllers, a laser diode can be operated with precise temperature control for
wavelength stability and temperature tuning. A zero insertion force (ZIF) socket accepts all standard 14-pin
butterfly laser diode packages. Easy to use configuration cards allow the laser mount to be configured for all
possible laser pin assignments.
Designed primarily for Laser Diodes, the LM14S2 can also be used with many two port Electro-optic devices that
are in 14-pin butterfly packages.
A Bias-T adapter is also included allowing the laser to be directly modulated up to 500 MHz. This adapter is
intended for use only with butterfly lasers that have integrated RF modulation components (i.e. blocking inductor
and 25 Ω input impedance).
Additional safety and protection features include an on board reverse bias protection diode, remote safety
interlock connection, and the TEC Lockout circuit that prevents enabling of the laser diode unless the temperature
controller is also enabled. Designed to work with our LDC and TED controllers, the TEC Lockout can easily be
bypassed by setting a switch.
Figure 1 Location of Features
LD Driver
Laser On
LM14S2
TEC Driver
ADAPTER
TEC LOCK
ACTIVE BYPASS
114
8
7
ZIF Socket for Laser
Diode or EO Device
Remote Interloc
k
(Side)
Laser ON Indicator
LD Driver Input
(DB9)
TEC Lockout Switch
Configuration Card
Inspection Windo
w
Bottom Cove
r
Screws (4 Places)
Mounting Cove
r
Screws (4 Places)
Pin Orientation
Numbers
TEC Driver Inpu
t
(DB9)

Butterfly Laser Diode Mount Chapter 4: Setup
Page 4 10614-D02
Chapter 4 Setup
4.1. Setup Instructions
Note: The following procedure applies to installing and using a butterfly laser diode with the LM14S2. For
information regarding electro-optic devices other than laser diodes, please refer to Section 10.2 AFTER reviewing
these instructions for configuration card and device installation.
1. Place the unit on a solid, dry working surface.
2. Remove the bottom cover from the unit by removing the four 4-40 screws from the bottom cover.
3. Determine the type of laser you are using, Type 1 Pump, Type 2 Telcom, or Other (refer to Section 4.2.1).
Install the appropriate configuration card into the 24-pin header located on the now exposed bottom side
of the main PCB:
a. If you are using a Type 1 laser, install the Type 1 / Type 2 configuration card into the 24-pin
header with the text “TYPE 1” facing towards the connector side of the unit.
b. If you are using a Type 2 laser, install the Type 1 / Type 2 configuration card into the 24-pin
header with the text “TYPE 2” facing towards the connector side of the unit.
c. If your laser does not match either a Type 1 or Type 2 pin-out, then you must use the custom
configuration card. See Section 4.2 for more information on wiring this card.
Make sure the socket on the configuration card is properly aligned with the 24-pin header.
4. Replace the bottom cover to the unit and secure it with the four 4-40 screws previously removed. The
cover must be oriented to allow the TEC LOCK switch to pass through it. When installed properly, the
configuration card can be identified through the inspection window in the bottom cover.
5. Connect the laser driver to the DB9 female connector labeled LD Driver. This connector is pin-for-pin
compatible with all Thorlabs LDC series laser diode controllers. If using other controllers, refer to Table 1
for the pin-outs for the LD driver connector.
6. Connect the TEC controller to the DB9 male connector labeled TEC Driver. This connector is pin-for-pin
compatible with the Thorlabs TEC controllers. If using other controllers, refer to Table 2 for the pin-outs
for the TEC driver connector.
7. Install the butterfly laser diode into the Zero Insertion Force (ZIF) sockets as follows:
a. Press the latching mechanisms on each ZIF socket away from the pin clamps to release the
clamps.
b. Swing the pin clamps forward to expose the contacts on each socket.
c. Remove the four 2-56 cap head screws mounted between the two ZIF sockets using a 5/64” ball
driver or suitable tool.
d. Apply a thin layer of thermal grease to the bottom of the butterfly laser diode (optional, but
recommended).
e. Carefully lay the butterfly laser diode onto the ZIF sockets. The output fiber of the laser must exit
towards the front of the mount, opposite the DB9 connectors. The pin orientation of the socket is
marked on the sides of the ZIF sockets. Align the pins into the slots for each contact.

Butterfly Laser Diode Mount Chapter 4: Setup
Rev E, May 8, 2018 Page 5
f. Install the four 2-56 cap head screws into the four mounting holes on the butterfly package,
securing the laser to the mount.
g. Swing the pin clamps back onto the ZIF socket, taking care that all of the laser diode pins are still
aligned onto the correct contacts.
h. Press the latching mechanism forward onto the pin clamps until they snap into place, latching the
pin clamps onto the pins and contacts.
4.2. Configuration Cards
The LM14S2 is shipped with two configuration cards needed to program the unit for the proper pin-outs for the
type of laser being installed in the mount. In most cases, the dual Type 1 / Type 2 Configuration Card can be used
to route the DB9 input signals to the mounted laser diode. Refer to Section 4.2.1 for specifics on which side of the
configuration card to use.
For non-standard devices that do not use the pin-out conventions described on the next page, we have included a
custom configuration card. This card is designed to allow you to easily configure the mount to any pin
configuration by soldering wires between the appropriate points on the card. For convenience, the outline of the
butterfly package is shown on both sides of the card, in its proper top and bottom views. In addition, an extra set
of holes is provided to allow multiple connections to one node.
Ideally a solid 26 – 30 AWG insulated wire can be used for the various connections, but any suitable wire can be
used.
Refer to Tables Table 1 and Table 2 for signal nomenclatures shown in bold type.
Figure 2 Custom Configuration Card

Butterfly Laser Diode Mount Chapter 4: Setup
Page 6 10614-D02
4.2.1. Configuration Card Pin-Outs
Refer to the following diagrams to determine which type of configuration card to use with your laser diode.
Figure 3 Type 1 Pump Laser Diode (View shows alternate locations for monitor and laser diodes.)
Figure 4 Type 2 Telcom Laser Diode
Figure 5 Type 2 Laser with Integrated Bias-T
981110 12 1413
CASE
- TEC +
LASER
DIODE*
THERMISTOR
MONITOR
DIODE
6734512
MONITOR
DIODE*
LASER
DIODE
8109
576
LASER
DIODE
1211 13 14
2143
THERMISTOR
MONITOR
DIODE
- TEC +
CASE
MONITOR
DIODE
CASE
8910
6
75
- TEC +
1211 13 14
3
412
LASER
DIODE
THERMISTOR

Butterfly Laser Diode Mount Chapter 4: Setup
Rev E, May 8, 2018 Page 7
4.3. Using the TEC / Laser Lockout Feature
The TEC / Laser Lockout feature provides an added level of protection for your butterfly laser diode. By
monitoring a status signal from the TEC controller, the laser driver can only be enabled if the TEC controller is
also enabled. This feature is activated by setting the TEC LOCK switch located on the bottom of the unit to the
proper position. Set this to “Active” to use this feature, or to “Bypass” to disable the feature. Designed for direct
compatibility with the Thorlabs LDC and TEC controllers, no additional wiring is required when used in conjunction
with these drivers.
4.4. Operating the Butterfly Laser Diode
Once the butterfly laser diode is properly mounted in the LM14S2, set the operating temperature using the TEC
controller. Once the set temperature has been reached, enable the laser diode, set the drive current or power
level, and control as you normally would.
4.5. Laser Controller Connection
4.5.1. Using the Thorlabs LDC Series Laser Controllers
The LM14S2 is best used with the Thorlabs LDC Series Laser Controllers. The LDC series drivers are shipped
with a mating DB9 cable that plugs directly into the controller and laser head. Using the cable supplied with the
LDC, the controller cannot be connected incorrectly. Also, the LDC has built-in protection circuitry that protects
the laser when not in use. Simply connect the DB9 cable included with the LDC to the laser mount and to the
controller.
4.5.2. Using a Third-Party Laser Controller
When using a third-party controller, a custom cable will have to be made to properly interface to the laser mount.
Please refer to Table 1 for laser connections.
Table 1 Laser Diode Connector Pin Functions
Pin Signal Description
1
Interlock and
Status Pin
(LDC Specific)
This pin is the input to the LD Status Indicator and Interlock Circuits. When using
Thorlabs LDCs, no external circuitry is required. To use these features with third-
party controllers please refer Section 5.2 of this manual.
5 Interlock and
Status Return This pin is the return side of the Status and Interlock circuitry.
7
Laser Diode
Cathode
LDC
Use this pin for the laser diode cathode connection. This pin must always be driven
more negative than Pin 3 (laser anode), otherwise a reverse bias protection diode
will clamp this pin to Pin 3.
8 - Not Used
3
Laser Diode
Anode
LDA
Use this pin for the laser diode anode connection. This pin must always be driven
more positive than Pin 7 (laser cathode), otherwise a reverse bias protection diode
will clamp this pin to Pin 7.
2
Photodiode
Cathode
PDC
Use this pin to connect to the integral monitor photodiode cathode of your laser
diode.
4
Photodiode
Anode
PDA
Use this pin to connect to the integral monitor photodiode anode of your laser diode.
6
Laser Diode
Voltage (-)
VLD(-)
This pin can be used to measure the voltage at the laser diode cathode. There is a
499 Ω resistor between this pin and the LD cathode.
9
Laser Diode
Voltage (+)
VLD(+)
This pin can be used to measure the voltage at the laser diode anode. There is a
499 Ω resistor between this pin and the LD anode.

Butterfly Laser Diode Mount Chapter 4: Setup
Page 8 10614-D02
4.6. TEC Controller Connection
4.6.1. Using the Thorlabs TED200C Controller
The LM14S2 is best used with Thorlabs TED200C or related TEC controllers. The TED200C is shipped with a
mating DB9 cable that plugs directly into the controller and laser mount. Using the cable supplied with the
TED200C, the controller cannot be connected incorrectly. Simply connect the cable included with the TED200C to
the laser mount and to the controller.
4.6.2. Using a Third-Party TEC Controller
When using a third-party controller, a custom cable will have to be made to properly interface to the laser mount.
Please refer to Table 2 for laser connections.
4.7. Grounding
Two jumpers, JMP1 and JMP2, are located on the main PCB, accessible by removing the bottom cover.
JMP1 allows you to connect the anode circuit on the main PCB to the shield connection of the LD Driver DB9
cable, in most cases making it common to the chassis of the LD driver and Earth. To completely float the circuit,
simply disconnect this jumper. The jumper can be placed on one of the other header pins for safe keeping. The
unit is shipped with JMP1 NOT installed.
CAUTION
If your laser driver has a grounded anode drive signal, removing JMP1 will not float the circuit, it will
simply disconnect it from the cable shield. In fact, when using a driver that does have a grounded
anode connection, it may be beneficial to remove JMP1 to prevent a ground loop from forming.
JMP2 allows you to connect the - Thermistor (TH_GND) signal to the laser diode anode on the main PCB. In
some cases, certain butterfly packages make this connection at the laser itself. The unit is shipped with JMP2
NOT installed.
Note: The Type 2 Configuration Card ties the laser diode Pin 8, Pin 9, Pin 11, and Pin 13 together, making the
anode of the LD common to the case of the device. Refer to Figure 4 for details.
Pin Signal Description
4 TEC(+) This pin is connected to the positive terminal of the TEC element integrated in the
laser diode.
5 TEC(-) and TEC
Lockout (-)
This pin is connected to the negative terminal of the TEC element, and also is
common to the cathode of the photo-relay of the TEC Lockout circuit - refer to the
Status and Interlock section of this manual.
1 TEC Lockout (+)
This pin is connected to the anode of the photo-relay side of the TEC Lockout
circuit. When using Thorlabs TECs, no external circuitry is required. To use these
features with third-party controllers please refer to the Status and Interlock section
of this manual.
2 +Thermistor
TH+ This pin is connected to the Thermistor integrated in the laser diode.
3 -Thermistor
TH_GND The Thermistor return pin. See Grounding Jumpers below.
7 - Not Used
9 - Not Used
6 - Not Used
8 - Not Used
Table 2 TEC Connector Pin Functions

Butterfly Laser Diode Mount Chapter 5: Operation
Rev E, May 8, 2018 Page 9
Chapter 5 Operation
5.1. RF Modulation
The LM14S2 has a Bias-T adapter to provide an RF input for modulating the laser with an external RF source up
to 500 MHz. The adapter has a 25 Ω input that is AC-coupled directly to the laser through a Bias-T network. This
adapter will only work with butterfly lasers specifically designed with an integrated blocking inductor and an
additional 25 Ω of input impedance (see Figure 5 below). The adapter makes its RF connection to Pin 12 of the
laser diode (typically an anode connection), and the return connection is made at Pin 13. This is a Type 2 laser,
therefore the TYPE 2 configuration option should be installed (see Section 4.1). The DC input to this type of laser
is applied to Pin 3 of the laser diode.
Install the Bias-T adapter as follows:
1. Install the laser diode as described in Step 7 of Section 4.1. Do not clamp the right side ZIF socket.
2. Remove the two black cap head screws on the right side ZIF socket. The socket will stay in place as it is
soldered to the main PCB below.
3. Orient the Bias-T adapter over the right side of the mount with the component side facing down.
4. Carefully place the adapter into the opening in the heat sink fins on the right side, orienting the two pins of
the adapter onto Pins 12 and 13 of the laser diode.
5. Install the two stainless steel cap head screws provided in the Bias-T kit. Do not over-tighten.
6. Clamp the ZIF socket down onto the remaining laser diode pins.
7. If the Bias-T adapter is removed, reinstall the black cap head screws removed in Step 2. Do not install the
stainless steel screws as they will interfere with the configuration card.
Figure 6 Installing the Bias-T Adapter
To calculate the desired RF power to modulate the laser, determine the amount of modulating current needed
from the laser manufacturer’s data sheets and use the following calculation:
LM14S2
TEC Driver LD Driver
Laser On

Butterfly Laser Diode Mount Chapter 5: Operation
Page 10 10614-D02
RF Voltage = (Laser Diode Modulating Current) * 50 Ω
It is strongly recommended that you start off conservatively by a factor of 10 below the calculated modulating
voltage and slowly bring the RF power up until the desired depth of modulation is reached.
Use the laser controller to establish the DC operating point of the laser.
WARNING
The RF input is directly coupled to the laser. Any excessive transients or noise will be coupled into
the laser, and may cause the laser to be overdriven. Also, the laser can be easily overdriven if
excessive RF power is applied to this input. Use the RF modulation with care to avoid damaging your
laser.
5.2. Status and Interlocks
This unit is equipped with two interlock circuits and an LED that indicates if the laser diode is enabled. All three
circuits are designed to interface with Thorlabs’ laser and TEC controllers with no external circuitry.
If third-party controllers are used to drive the laser diode or TEC elements then ONLY the LD ON indicator can be
used. To prevent damage to the Status and Interlock circuits, the following external connections should be
followed:
1. Install the shorting device into the REMOTE INTRLK connector that was shipped with the LM14S2.
2. Set the TEC Lock switch on the bottom of the unit to “Bypass”.
3. Connect a resistor to LD Interface DB9 Pin 1 that is appropriately sized to limit the current into Pin 1 to
between 5 and 10 mA.
4. The “driver” side of this resistor should be connected to a DC signal that, when high, indicates that the
laser diode is being driven.
If you have any questions regarding these connections, or if you wish to make full use of all the Status and
Interlock features with your third party drivers, please contact Thorlabs Tech Support.
5.3. Maintaining the LM14S2
There are no serviceable parts in the LM142. The housing may be cleaned by wiping with a soft damp cloth. If
you suspect a problem with your LM14S2, please call Thorlabs Tech Support and an engineer will be happy to
assist you.

Butterfly Laser Diode Mount Chapter 6: Safety Interlock Connections
Rev E, May 8, 2018 Page 11
Chapter 6 Safety Interlock Connections
The LM14S2 is equipped with a Remote Interlock Connector located on the side panel. In order to enable the
laser driver, a short circuit must be applied across the terminals of the Remote Interlock Connector. In practice,
this connection is made available to allow the user to connect a remote actuated switch to the connector (i.e. an
open door indicator). The switch (which must be normally open) has to be closed in order for the unit to be
enabled. Once the switch is in an open state, the laser diode must automatically shut down.
All units shipped from Thorlabs are configured with a shorting device installed in the interlock connector. If you are
not going to use this feature then you can leave the shorting device installed and the unit will operate normally as
described in the procedures in this manual. If you wish to make use of the interlock feature, you will need to
acquire the appropriate connector mate and wire it to your remote interlock switch. Next, remove the shorting
device by unscrewing it from the input and install the connector into the interlock input.
The interlock input only accepts a 2.5 mm mono phono jack. This connector is readily available at most
electronics stores (Radio Shack, Digikey, Mouser, Allied, etc.).
The electrical specifications for the interlock input are as follows:
Specification Value
Type of Mating Connector 2.5 mm Mono Phono Jack
Open Circuit Voltage +5 VDC with Respect to Chassis Ground (when used in conjunction with
Thorlabs drivers)
Short Circuit Current 10 mA DC (Typical)
Connector Polarity Tip is Positive, Barrel is Ground
Interlock Switch
Requirements
Must be N.O. Dry Contacts. Under no circumstances should any external
voltages be applied to the Interlock Input
Figure 7 Remote Interlock Connector

Butterfly Laser Diode Mount Chapter 7: Troubleshooting
Page 12 10614-D02
Chapter 7 Troubleshooting
Laser Driver Will Not Enable
If you are using Thorlabs Laser and TEC controllers with your LM14S2:
Possible Solution Directions
Remote interlock is open
Make sure that either the shorting device is installed in the REMOTE INTRLK
connector on the side of the LM14S2. If you have a remote interlock switch
connected to this REMOTE INTRLK connector, it must be in a closed position.
TEC element is not active The internal TEC Lockout is preventing the laser diode form operating. Make sure
the TEC control is active.
Laser Wavelength or Power is Unstable Even Though the TEC Controller Shows Stable Temperature
Possible Solution Directions
LD is not fully seated
Make sure your laser diode is fully inserted into the LM14S2 laser mount and its
body is in full contact with the heat sink base, and the four securing screws are
tightened.
The LDC Series Laser Driver Indicates an “Open Circuit” Alarm When You Try to Enable the Laser
Possible Solution Directions
LD polarity switch may be
incorrect on the driver
In most cases your butterfly laser will operate with an anode grounded polarity.
Therefore, set the LD polarity switch on the back of your LDC series driver to AG.
My Laser Diode Does Not Turn On at All
Possible Solution Directions
The configuration card
may be installed
incorrectly
Make sure you have the correct configuration card installed and that it is seated in
the 24-pin hearder properly. This is easily checked by turning the unit over and
reading the card type in the adapter inspection window (see Figure 1)

Butterfly Laser Diode Mount Chapter 8: Specifications
Rev E, May 8, 2018 Page 13
Chapter 8 Specifications
Performance Specifications
Laser Specifications
Lasers Supported 14 Pin-Butterfly
Maximum Laser Current 5 A
Laser Pin Configurations User Configurable
RF Modulation Frequency 100 kHz to 500 MHz
RF Input Connection SMA
RF Input Impedance 25 Ω (On Bias-T Adapter)
Maximum RF Power 200 mW or Limit of Laser Diode
Laser Polarity Anode Grounded (See Section 4.7)
TEC Specifications
Maximum TEC Current 5 A
Maximum TEC Voltage Laser Specific
TEC Heating / Cooling Capacity Laser Specific
Typical Temperature Range
(LD Dependent) 0 to 70 °C
Temperature Sensors Laser Specific
Physical Specifications
Size
(Not Including Ports) 3.5” x 3.5” x 1.25” (88.9 mm x 88.9 mm x 31.75 mm)
Weight 0.6 lb (0.27 kg)

Butterfly Laser Diode Mount Chapter 9: Mechanical Drawing
Page 14 10614-D02
Chapter 9 Mechanical Drawing

Butterfly Laser Diode Mount Chapter 10: Appendix
Rev E, May 8, 2018 Page 15
Chapter 10 Appendix
10.1. NEL Module Type STB
The NEL laser diode shown in Figure 8 differs slightly from a standard Type 2 Telcom laser in that the laser diode
cathode connection is presented on Pin 12 instead of Pin 3.
Figure 8 NEL Type STB Laser
In its normal configuration, the LM14S2 has an open connection to Pin 12 of the laser diode ZIF socket. This is
done to prevent conflicts while using the Bias-T adapter on Type 2 laser diodes with internal Bias-T components
(see Figure 5).
To operate this type of NEL laser diode in a CW mode, the following modification can be easily made to the
LM14S2 that will connect Pin 12 to the laser diode cathode circuit internal to the mount:
1. Remove the bottom plate and any adapter cards that
may be installed, exposing the bottom of the main PCB
of the LM14S2.
2. Pin 12 is identified by two adjacent pads with a narrow
slit between them (see Figure 9 to the right).
3. If you have a Revision A Type 1 / Type 2 adapter card
(Rev marking is located next to the “TYPE 1” text),
carefully install a wire connecting Pin 12 of the ZIF
socket to Pin 3.
4. If you have a Revision B or higher adapter card,
carefully flow a small bead of solder across the slit at
Pin 12, bridging the two pads.
5. Install the TYPE 1 / TYPE 2 adapter card with the TYPE
2 connector mating with the main PCB of the LM14S2.
10.2. Two-Port Electro-Optic Devices
The LM14S2 allows for mounting a two port, fiber-coupled,
electro-optic (EO) device. Typically these devices will have
ports on opposite sides of their packages with fiber-optic cables
extending from each port. In some cases, they may contain an
integrated thermos-electric cooler or require some form of
current input to operate the device. The LM14S2 can
accommodate most devices of this type.
8109111312 14
721
5
643
THERMISTOR
- TEC +
LASER
DIODE
CASE
MONITOR
DIODE
Figure 9 Adapter Card Detail
Pin 12
Pin 3

Butterfly Laser Diode Mount Chapter 10: Appendix
Page 16 10614-D02
In order to make the necessary connections between the DB9 input connectors and the ZIF socket, you will need
to use the Custom Configuration Card provided with the LM14S2. Please review Sections 4.1 and 4.2.
When installing the EO device, please observe proper device polarity by orienting the device’s pins with the pins
on the ZIF sockets according to the pin designations printed to the side of each ZIF socket.
The nomenclature for the custom configuration card applies to laser diode functions, but can easily be adapted to
most EO device functions. Please refer to Tables Table 1 and Table 2 for specifics on the connections. If you
have problems working out the configuration, please feel free to contact Tech Support for assistance.
CAUTION
The LM14S2 is intended for use with negative driven current sources connected to the LDC
connection with respect to the LDA input. That is to say, the LDA connection will be grounded and the
LDC connection will have a negative potential. The LM14S2 incorporates a diode clamp across the
LDA/LDC connections at the DB9 connector. Therefore, if the LDC input is driven positive, the diode
will conduct and shunt current directly to the LDA input, bypassing the EO device entirely.
Figure 10 The LM14S2 with a Two-Port Electro-Optic Device
TEC Driver
LM14S2
7
Laser On
LD Driver
8
114

Butterfly Laser Diode Mount Chapter 11: Regulatory
Rev E, May 8, 2018 Page 17
Chapter 11 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.
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Chapter 1Thorlabs Worldwide Contacts
USA, Canada, and South America
Thorlabs, Inc.
56 Sparta Avenue
Newton, NJ 07860
USA
Tel: [phone]
Fax: [phone]
www.thorlabs.com
www.thorlabs.us (West Coast)
Email: [e-mail]
Support: [e-mail]
UK and Ireland
Thorlabs Ltd.
1 Saint Thomas Place
Ely CB7 4EX
Great Britain
Tel: [phone]
Fax: [phone]
www.thorlabs.com
Email: [e-mail]
Support: [e-mail]
Europe
Thorlabs GmbH
Hans-Böckler-Str. 6
85221 Dachau / Munich
Germany
Tel: [phone]
Fax: [phone]
www.thorlabs.de
Email: [email protected]om
Scandinavia
Thorlabs Sweden AB
Bergfotsgatan 7
431 35 Mölndal
Sweden
Tel: [phone]
Fax: [phone]
www.thorlabs.com
Email: [e-mail]
France
Thorlabs SAS
109, rue des Côtes
78600 Maisons-Laffitte
France
Tel: [phone]
Fax: [phone]
www.thorlabs.com
Email: [e-mail]
Brazil
Thorlabs Vendas de Fotônicos Ltda.
Rua Riachuelo, 171
São Carlos, SP 13560-110
Brazil
Tel: [phone]
Fax: [phone]
www.thorlabs.com
Email: [email protected]
Japan
Thorlabs Japan, Inc.
3-6-3 Kitamachi,
Nerima-ku, Tokyo 179-0081
Japan
Tel: [phone]
Fax: [phone]
www.thorlabs.co.jp
Email: [e-mail]
China
Thorlabs China
Room A101, No. 100, Lane 2891,
South Qilianshan Road
Putuo District
Shanghai 200331
China
Tel: [phone]
Fax: [phone]
www.thorlabschina.cn
Email: [email protected]