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Butterfly Laser Diode Mounts


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Features

  • Laser Diode Mount for 14-Pin Butterfly Packages
  • Zero Insertion Force (ZIF) Mounting Socket
  • Type 1, Type 2, Type 2 with Bias-T, 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 featurea 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. However, due to limitations in heat sinking, it cannot be used with our tapered amplifiers.

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 designed for lasers with a type 2 pin configuration including an internal bias-T and built-in blocking inductor. For more details on the pin assignments, please refer to the Pin Diagrams tab as well as the spec sheet for the specific laser diode to be used. Please note that Thorlabs' butterfly package laser diodes are not compatible with the bias-T adapter.

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. Thorlabs also manufactures customized, application-specific butterfly mounts for OEM customers. Please see the OEM Modules tab for details.

  • The TEC lockout feature only functions with Thorlabs' laser and TEC controllers, and can be easily bypassed if not required.
Item #LM14S2
Maximum Laser Current5 A
Polarity of Laser DiodeAnode Ground
Polarity of Monitor DiodeFloating
Maximum TEC Current5 A
Temperature SensorThermistora
Temperature Rangeb0 to 70 °C
Temperature Coefficient of Heat Sink3 °C/W
Dimensions3.50" x 3.50" x 1.31"
(88.9 mm x 88.9 mm x 33.3 mm)
Modulation (Bias-T Adapter) Specificationsc
RF Modulation Frequency100 kHz to 500 MHz
RF Input ConnectionSMA
RF Input Impedance25 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
1Interlock and Status Pin (LDC Specific)
2Photodiode Cathode PDC
3Laser Diode Anode LDA
4Photodiode Anode PDA
5Interlock and Status Return
6Laser Diode Voltage (-) VLD(-)
7Laser Diode Cathode LDC
8Not Used
9Laser Diode Voltage (+) VLD(+)

Bias-T Modulation Adapter*

SMA Female

SMA-female

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

TEC Connector

D-type Male

DB9 Male

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

Pin Assignment of the 14-pin Sockets

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

Pin to Connector Configuration for Type 1Pin to Connector Configuration for Type 2Pin to Connector Configuration for
Type 2 with Bias-T

Click to Enlarge

Click to Enlarge

Click to Enlarge
1TEC Anode1Thermistor Ground1Thermistor Ground
2Thermistor2Thermistor2Thermistor
3PD Anodea3LD Cathode3LD Cathode
4PD Cathodea4PD Anode4PD Anode
5Thermistor Ground5PD Cathode5PD Cathode
6N.C.6TEC Anode6TEC Anode
7PD Cathodea7TEC Cathode7TEC Cathode
8PD Anodea8Case8Case
9LD Cathodeb9Case9Case
10LD Anode, Ground10N.C.10N.C.
11LD Cathodeb11LD Anode11LD Anode
12N.C.12N.C.12Modulation Inputc
13LD Anode, Ground13LD Anode13LD Anode
14TEC Cathode14N.C.14N.C.
  • The monitor photodiode may be placed across either pins 7 and 8 or pins 3 and 4. Please refer to the Laser Diode's documents for the specific pin configuration.
  • The laser diode cathode may be placed at either pin 9 or pin 11. Please refer to the Laser Diode's documents for the specific pin configuration.
  • When Using the Bias-T Adapter PCB.
Custom Module for Two 14-Pin Butterfly Packages
Click to Enlarge

Custom Module for 14-Pin Butterfly Packages

Thorlabs OEM Manufacturing

In addition to manufacturing a wide variety of active optical devices, Thorlabs is equipped to deliver customized laser diode, superluminescent diode, and semiconductor optical amplifier modules in OEM quantities. For example, the module shown to the right provides temperature and current control for two superluminescent diodes (SLDs) from an SPI interface. Because this module is designed for standard 14-pin butterfly packages, it is easily adapted for combinations of other optical devices, such as a pigtailed semiconductor laser with an optical amplifier.

As a manufacturer of III-V semiconductor devices, MEMS-VCSEL lasers, quantum cascade lasers, lithium niobate optical modulators, and other devices, we are intimately familiar with the operating requirements of driving lasers and related components. Please visit this webpage for an overview of our laser manufacturing facility, or contact us directly to discuss your application's needs.

Contact Thorlabs Tech Support

LM14S2 SmartPack Packaging
Click to Enlarge

LM14S2 Packaging

Smart Pack

Item #% Weight
Reduction
CO2-Equivalent
Reductiona
LM14S221.52%30.10 kg

Smart Pack

  • Reduce Weight of Packaging Materials
  • Increase Usage of Recyclable Packing Materials
  • Improve Packing Integrity
  • Decrease Shipping Costs

Thorlabs' Smart Pack Initiative is aimed at waste minimization while still maintaining adequate protection for our products. By eliminating any unnecessary packaging, implementing packaging design changes, and utilizing eco-friendly packaging materials for our customers when possible, this initiative seeks to improve the environmental impact of our product packaging. Products listed above are now shipped in re-engineered packaging that minimizes the weight and the use of non-recyclable materials.b As we move through our product line, we will indicate re-engineered packages with our Smart Pack logo.

  • Travel-based emissions reduction calculations are estimated based on the total weight reduction of packaging materials used for all of 2013’s product sales, traveling 1,000 miles on an airplane, to provide general understanding of the impact of packaging material reduction. Calculations were made using the EPA’s shipping emissions values for different modes of transport.
  • Some Smart Pack products may show a negative weight reduction percentage as the substitution of greener packaging materials, such as the Greenwrap, at times slightly increases the weight of the product packaging.
Click the Support Documentation icon document icon or Part Number below to view the available support documentation
Part Number Product Description
LM14S2 Support Documentation LM14S2 : Universal 14 Pin Butterfly LD Mount
LM14S2-UA Support Documentation LM14S2-UA : LM14S2 Universal Adapter

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Posted Comments:
Poster: schdingo
Posted Date: 2014-11-18 15:00:38.487
Dear Sir or Madam, what is the maximum heat capacity of the LM14S2? Sincerely
Poster: jlow
Posted Date: 2013-11-19 09:23:30.0
Response from Jeremy at Thorlabs: The LED indicator needs a certain amount of current (5-10mA) to turn on. We will get in touch with you directly to troubleshoot this.
Poster: emsia
Posted Date: 2013-11-19 10:52:41.403
Dear Sir/Madam, I am using ILX LDC to control my laser mounted on LM14S2. Everything works perfectly except when the laser is on, the LED does not turn on. The intelock is on bypass mode. The pin 1 os LD is connected to intrlk of the ILX LDC and pin 5 to the ground. any suggestions would be appreciated. Thank you
Poster: tcohen
Posted Date: 2013-07-11 16:20:00.0
Response from Tim at Thorlabs to Thomas: Thank you for contacting us. Yes, it should be switched to Bypass. You can use that resistance but you may use slightly higher as the current should be limited to a maximum of 10mA.
Poster: thomas.chassagne
Posted Date: 2013-07-02 15:29:14.367
Hi, I would like to use the LM14S2 with the TED200 TEC controller and an external electronic board that command the bias current. In order to disable the Status and the Interlock function, Should I switch the TEC Lock button to "Bypass" ? In the Operating Manual, it's said that a resistor should be used to limit the curent into the PIN1 to between 5. Thus, if I connect the "driver" side of the resistor to 5V, I should use a 500Ohm resistor and connect the PIN5 to the ground ? Thanks, Thomas
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: 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: 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: 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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14-Pin Butterfly Laser Diode Mounts

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