Features

Laser Diode Mount for 14-Pin Butterfly Packages
Zero Insertion Force (ZIF) Mounting Socket
Type 1, Type 2, and User-Defined Pinout Configurations
LED Indicates When Laser is Enabled

The LM14S2 Universal 14-Pin Butterfly Laser Diode Mount is designed for use with lasers and two-port electrooptic devices in a 14-pin butterfly package. The top surface has heat sink fins and a recessed region to mount the laser diode, resulting in a low profile package with a temperature coefficient of 3 °C/W. The LM14S2 also includes a laser diode TEC lockout feature^a that disables the laser when the TEC controller is not active. The LM14S2 supports maximum laser and TEC currents of 5 A each. In order to utilize the TEC controller, the laser must have an integrated thermoelectric cooler (TEC) or thermistor sensors. This mount also features a zero insertion force (ZIF) socket, a remote safety interlock connection, and an LED to indicate that the laser diode is enabled.

The LM14S2 eliminates the restriction of fixed pin configuration mounts by using exchangeable configuration cards that plug into a connector located on the bottom of the mount. Two cards are delivered with the LM14S2. One card provides compatibility with both Type 1 Pump Laser Diodes and Type 2 Telecom Laser Diodes. For the pin diagrams that correspond to these types, please refer to the Pin Diagrams tab. The second card is a user-configurable card (LM14S2-UA) designed to allow custom wiring of the mount. Additional user-configurable cards are available and can be ordered separately. Please note that even with an LM14S2-UA, only anode-grounded diodes can be used with the LM14S2 butterfly laser mount.

In addition to the configurable pinout feature, a bias-T adapter is included, allowing for RF modulation of butterfly lasers specifically designed with this capability. It features a female SMA connector for an RF source up to 500 MHz, and is specifically designed for lasers with a type 2 pin configuration. For more details on the pin assignments, please see the Pin Diagrams tab.

The LM14S2 is pin-for-pin compatible with all Thorlabs' benchtop laser diode and TEC controllers, and most of our platform laser and TEC controllers as well, eliminating the need for custom-made interface cables.

The TEC lockout feature only functions with Thorlabs' laser and TEC controllers, and can be easily bypassed if not required.

Item #	LM14S2
Maximum Laser Current	5 A
Polarity of Laser Diode	Anode Ground
Polarity of Monitor Diode	Floating
Maximum TEC Current	5 A
Temperature Sensor	Thermistor^a
Temperature Range^b	0 to 70 °C
Temperature Coefficient of Heat Sink	3 °C/W
Dimensions	3.50" x 3.50" x 1.31" (88.9 mm x 88.9 mm x 33.3 mm)
Modulation (Bias-T Adapter) Specifications^c
RF Modulation Frequency	100 kHz to 500 MHz
RF Input Connection	SMA
RF Input Impedance	25 Ω
RF Power (Max)	200 mW or Limit of Laser Diode

At 25 °C with 2 A of TEC current, integrated into the laser package.
This is the temperature range supported by the LM14S2. Installed laser diodes may have different ranges.
The bias-T adapter is only compatible with Type 2 Telecom Laser Diodes (see the Pin Diagrams tab for details).

Laser Diode Connector

D-type Female

DB9 Female

Pin #	Signal
1	Interlock and Status Pin (LDC Specific)
2	Photodiode Cathode PDC
3	Laser Diode Anode LDA
4	Photodiode Anode PDA
5	Interlock and Status Return
6	Laser Diode Voltage (-) VLD(-)
7	Laser Diode Cathode LDC
8	Not Used
9	Laser Diode Voltage (+) VLD(+)

TEC Connector

D-type Male

DB9 Male

Pin #	Signal
1	TEC Lockout (+)
2	+Thermistor TH+
3	-Thermistor TH_GND
4	TEC (+)
5	TEC (-) and TEC Lockout (-)
6	Not Used
7	Not Used
8	Not Used
9	Not Used

Pin Assignment of the 14-pin Sockets

Pin to Connector Configuration for Type 1		Pin to Connector Configuration for Type 2

1	TEC Anode	1	Thermistor Ground
2	Thermistor	2	Thermistor
3	PD Anode	3	LD Cathode (DC)
4	PD Cathode	4	PD Anode
5	Thermistor Ground	5	PD Cathode
6	N.C.	6	TEC Anode
7	PD Cathode	7	TEC Cathode
8	PD Anode	8	LD Anode, Ground
9	LD Cathode	9	LD Anode, Ground
10	LD Anode, Ground	10	N.C.
11	LD Cathode	11	LD Anode, Ground
12	N.C.	12	LD Cathode (RF)
13	LD Anode, Ground	13	LD Anode, Ground
14	TEC Cathode	14	N.C.

The custom configuration card can be used for any other PIN configuration. Additional cards can be ordered separately. Please use item number LM14S2-UA.

Bias-T Modulation Adapter*

SMA Female

SMA-female

*RF input for modulation with an external source from 100 kHz to 500 MHz.

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Posted Comments:

Poster: mlaroton

Posted Date: 2013-03-14 10:48:56.47

Hi, I would like to use the LM14S2 mount with the FLD5F10NP-A Modulator-integrated DFB laser. In this laser, the case ground is the laser cathode. I wonder if I can still use your mount; do I need a non-standard Adapter Card? or does this feature prevents me to use your mount at all? Thanks, Miguel.

Poster: tcohen

Posted Date: 2013-03-14 13:22:00.0

Response from Tim at Thorlabs: Physically it appears as if your modulation connection opposite to the pins would interfere with our package designed for a 14pin butterfly. Even if this were to fit however, and a custom configuration card LM14S2-UA was to be used, the LM14S2 is suitable only for anode-grounded diodes.

Poster: jjurado

Posted Date: 2011-06-15 11:29:00.0

Response from Javier at Thorlabs to zhemin.cai: Thank you very much for contacting us. We can certainly provide reference drawings that you might be able to use in order to determine whether the LM14S2 will work with your pigtail. Please contact us at techsupport@thorlabs.com, and we will gladly assist you.

Poster: zhemin.cai

Posted Date: 2011-06-10 06:55:59.0

Dear Sir/Madam, I am wondering is that possible to get the mechanical drawing for the LM14S2? Becasue we want to use it to hold a long butterfly package, I want to check if it is fit in or not. Cheers. Zhemin.Cai

Poster: tor

Posted Date: 2011-01-04 14:35:52.0

Response from Tor at Thorlabs to mhafiz.abakar: Thank you for your interest in our LM14S2. This mount is compatible with our LDC8040 and TED8040 via compatible connector cables, http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=895 . We recommend a CAB400 to connect to the LDC and a CAB420-15 to connect to the TED.

Poster: mhafiz.abakar

Posted Date: 2010-12-28 21:23:58.0

Is this laser diode mount suitable to be used with LDC8040 and TED8040 on a pro800 mainframe. thanks.

Poster: serefocal

Posted Date: 2010-02-10 10:03:30.0

Dear Sir/Madam:What is the "LM14S2 Butterfly Laser Diode Mounts"s Heat Dissipation Capacity? May I learn? Thanks...

Poster: apalmentieri

Posted Date: 2010-02-10 08:58:39.0

A response from Adam at Thorlabs to serefocal: The LM14S2 is designed to be used with a temperature controller, like the TED200C. It has the ability of controlling the temperature between 0 and 70 degrees C. The temperature coefficient of the heat sink is 3 degreeC/W. I will email you directly to answer any other questions you may have.

Poster: klee

Posted Date: 2009-09-09 10:44:30.0

A response from Ken at Thorlabs to yuhengc: An applications engineer will contact you directly to discuss about the problem.

Poster: yuhengc

Posted Date: 2009-09-09 09:24:44.0

Dear Sir/Madam: We are using LM14S2. Recently we found the current waveform of DFB LD was not stable. The current drive seems to be OK. Since it is new one and I tested with two simulated diode in series. There was no problem. But when I connected to the LD. The current waveform ( monitored from the current feedback)was not constant. Even worst, after a period of fluctuation, it kept decreasing and finally went down to zero. Sometime, if I switched off the driver and powered up again. The current recovered. The LD is the NEL with a little difference layout of pin to type two laser. I am using type 2 configuration card with pin12 connected as the instruction from the manual. What ,do you think, is the reason?

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