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OEM Laser Diode Driver: Constant Power


  • Constant Power
  • APC Laser Driver, 0 - 250 mA
  • Driver Kits Pre-Wired to Styles A & B

LD1100

LD1101

EK1102

Related Items


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Item# LD1100 LD1101 EK1101a EK1102b
Output Current 0 - 250 mA
Supported Laser Pin Configurations A, B, D, & F C, D, & F A B
Recommended for LEDsb No No Yes Yes
Output Control 12-Turn Power Adjustment (On-Board)
Output Stability 1.5%
Output Noise 5 μA RMS
Feedback Gain Adjustable
Monitor Current Range 5 μA to 5 mA
Operating Voltage 8 to 12 VDC
Quiescent Current 9 mA
Dimensions 1" x 1.5"
12-Pin SIP Package
See Drawing
ESD Protection 100 ms Slow Start
Max Output Voltage ~6.5 V (with a 12 V Power Supply)
  • The EK1101 and EK1102 can be used with pin configurations D and F if the included socket is replaced with a suitable 4-pin socket. The socket must be wired correctly in order to support the pin style.
  • With monitor photodiode.

Laser Diode Drivers
The LD1100 and LD1101 Laser Diode Drivers are constant-power laser driver modules that support common laser anode and common laser cathode pin configurations. They feature an on-board 12-turn trim pot for continuous laser power output adjustment, pin-programmable feedback gain, ON/OFF control input, and a current monitor output for observing the laser drive current. With dimensions of only 1" x 1.5", they are compact and can be embedded into custom designs. The compliance voltage, which is the maximum output voltage, is ~6.5 V for the LD1100 and LD1101 when using a 12 V power supply. All input and output signals are provided on a 12-pin SIP connector, which allows simple integration into a printed circuit design.

The LD1100 and LD1101 can drive lasers up to 250 mA in a constant-power mode. Either uses the internal monitor photodiode for a feedback signal into a proportional-integral feedback loop to stabilize the output power to within 1.5%. To accommodate a wide range of laser diodes, the feedback gain can be set by using jumpers between any combination of the five gain setting resistor pins to the power supply common. This allows lasers with monitor currents over a range from 5 μA to 5 mA to be used with a single driver.

Evaluation Kits
The EK1100 Series Evaluation Kit is an LD1100 Laser Driver soldered to a PCB that features an on/off switch and a dip switch bank for controlling the gain on the feedback signal. A 3-pin laser socket cable (S8060) is also soldered onto the PCB board (this determines the pin configuration supported by the kit). In addition to driving lasers, the EK1101 and EK1102 are also suggested for operating LEDs that contain a monitor photodiode with an A or B style pin configuration, respectively.

Power Supply Options
A power supply cable for 9 V batteries is included but not attached. Alternatively, our LDS9 power supply can be used if the phono connector is removed and the bare wires are exposed.

Supported Pin Configurations

Supported Pin Configurations

LD1100 Pin Configurations

LD1100 Diagram
PinSignalDescription
1 +V Circuit Power, 8 to 12 VDC, 9 mA + Laser Drive Current
NOTE: Internally tied to Laser Diode Anode,
the laser anode must be isolated from the power supply COM
2 COM Circuit Ground
3 VREF Internal 2.5 V reference
4 PDA Photodiode Anode
5 LDA Laser Diode Anode (Internally Tied to +V (Pin 1))
6 LDC Laser Diode Cathode
7 RA When Tied to Common, Puts 100 kΩ in Parallel
with 249 kΩ Internal Gain Resistor
8 RB When Tied to Common, Puts 33.2 kΩ in Parallel
with 249 kΩ Internal Gain Resistor
9 RC When Tied to Common, Puts 10 kΩ in Parallel
with 249 kΩ Internal Gain Resistor
10 RD When Tied to Common, Puts 3.32 kΩ in parallel
with 249 kΩ Internal Gain Resistor
11 RE When Tied to Common, Puts 1 kΩ in Parallel
with 249 kΩ Internal Gain Resistor
12 ILD Laser Diode Current Monitor (10 mV/mA)

LD1101 Pin Configurations

LD100X Diagram
PinSignalDescription
1 +V Circuit Power, 8 to 12 VDC, 9 mA + Laser Drive Current
NOTE: Internally tied to Laser Diode Anode.
The laser anode must be isolated from the power supply COM.
2 COM Circuit Ground
3 VREF Internal 2.5 V reference
4 PDC Photodiode Cathode
5 LDA Laser Diode Anode (Internally Tied to +V (Pin 1))
6 LDC Laser Diode Cathode
7 RA When Tied to Pin 6, Puts 5 kΩ in parallel
with 12.4 kΩ Internal Gain Resistor
8 RB When Tied to Pin 6, Puts 1.5 kΩ in parallel
with 12.4 kΩ Internal Gain Resistor
9 RC When Tied to Pin 6, Puts 499 Ω in parallel
with 12.4 kΩ Internal Gain Resistor
10 RD When Tied to Pin 6, Puts 160 Ω in parallel
with 12.4 kΩ Internal Gain Resistor
11 RE When Tied to Pin 6, Puts 33 Ω in parallel
with 12.4 kΩ Internal Gain Resistor
12 ILD Laser Diode Current Monitor (10 mV/mA)

EK1101

Laser Anode - Photodiode Cathode Common

Pin Style A

Laser PinJ1 Pin (on Evaluation Board)Wire Color
PDA PD_A Green
LDA/PDC LD_A Red
LDC LD_C Yellow

EK1102

Laser Cathode - Photodiode Cathode Common

Pin Style B

Laser PinJ1 Pin (on Evaluation Board)Wire Color
PDA PD_A Green
LDA LD_A Yellow
LDC/PDC LD_C Red

EK110x Laser Socket Wire Harness

Laser Socket

EK1101 SmartPack Packaging
Click to Enlarge

EK1101 Packaging

Smart Pack

Item #% Weight
Reduction
CO2-Equivalent
Reductiona
EK1101 19.70% 3.79 kg
EK1102 19.70% 0.28 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.

Posted Comments:
Justin Molloy  (posted 2019-09-12 09:54:30.837)
I have made a simple "hack" to enable computer control of power using this driver. If you would like to see the small modification required and/or would like the Arduino code for manual rotary encoder power control and ability to control via RS232 please feel free to contact me. There would be NO Warranty at all and I accept no liability for any faults in design/software etc - i.e. use entirely at your own risk!
YLohia  (posted 2019-09-12 12:59:25.0)
Hello Justin, thank you for contacting Thorlabs and offering us this code. I have added this to our internal knowledge base with due credit to you. We believe the rest of our customer base will really appreciate this as well. This code can now be requested by our other customers by emailing techsupport@thorlabs.com.
mitch  (posted 2016-08-11 03:48:19.71)
Hi, is it possible to use the LD1100 to bias a VCSEL?
jlow  (posted 2016-08-15 10:31:03.0)
Response from Jeremy at Thorlabs: This board is not recommended for VCSEL by itself. You could use it in conjunction with our T1G bias-T PCB for pulsed operation. We also have VCSEL drivers at https://www.thorlabs.com/newgrouppage9.cfm?objectgroup_id=1377.
x.attendu  (posted 2016-06-27 12:53:28.85)
Hi, I would like to know if it would be possible to drive multiple laser diodes simultaneously with this product. The idea would be to connect 3 different laser diodes in parallel each with a laser diode bias tee to modulate their currents separately. Would this work or am I going to fry the driver ? Thank you for your time.
jjurado  (posted 2011-04-06 16:59:00.0)
Response from Javier at Thorlabs to li.li: Thank you for contacting us with your request. The change in driving current is a result of heating of the laser diode. The EK1102 is a constant power laser diode driver, and, as the diode heats up and loses efficiency, the driver injects more current in order to keep the power output constant. If the diode has a relatively high operating current, and if the experiment requires the diode to be turned on for extended periods of time, it is recommended to provide temperature control in order to prevent potential damage. If passive heat dissipation by a heatsink is not enough, then it would be recommended to use a thermoelectric cooler. You can find our offerings through the following link: http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=305 I will contact you directly in case you have additional questions.
li.li  (posted 2011-04-06 13:43:11.0)
The LD driving current is increasing with time. Is it caused by the temperature of laser diode? Shall I set a maximum driving current for the laser diode through the EK1102, otherwise Im affraid the diode laser will be damaged. Probably I need a Peltier cooler, could you please recommend me some products for the laser diode cooler? Thank you for your time.
Tyler  (posted 2009-01-08 16:44:18.0)
A response from Tyler at Thorlabs to melsscal: This modification can be made. I will have a member of our technical support department contact you. They can create a quote for the modified part.
melsscal  (posted 2009-01-08 06:45:59.0)
Can you arrange to make a connector for connecting the LDS2 to EK1101 ? Regards A.K.Bose MELSS KOLKATA/INDIA melsscal@melss.com

Laser Diode Controller Selection Guide

The tables below are designed to give a quick overview of the key specifications for our laser diode controllers and dual diode/temperature controllers. For more details and specifications, or to order a specific item, click on the appropriate item number below.

Current Controllers
Item # Drive Current Compliance Voltage Constant Current Constant Power Modulation Package
LDC200CV 20 mA 6 V Yes! Yes! External Benchtop
VLDC002 25 mA 5 V Yes! - Int/Ext OEM
LDC201CU 100 mA 5 V Yes! Yes! External Benchtop
LD2000R 100 mA 3.5 V - Yes! External OEM
EK2000 100 mA 3.5 V - Yes! External OEM
LDC202C 200 mA 10 V Yes! Yes! External Benchtop
KLD101 230 mA ≤10 V Yes! Yes! External K-Cube™
IP250-BV 250 mA 8 Va Yes! Yes! External OEM
LD1100 250 mA 6.5 Va - Yes! -- OEM
LD1101 250 mA 6.5 Va - Yes! -- OEM
EK1101 250 mA 6.5 Va - Yes! -- OEM
EK1102 250 mA 6.5 Va - Yes! -- OEM
LD1255R 250 mA 3.3 V Yes! - External OEM
LDC205C 500 mA 10 V Yes! Yes! External Benchtop
IP500 500 mA 3 V Yes! Yes! External OEM
LDC210C 1 A 10 V Yes! Yes! External Benchtop
LDC220C 2 A 4 V Yes! Yes! External Benchtop
LD3000R 2.5 A -- Yes! - External OEM
LDC240C 4 A 5 V Yes! Yes! External Benchtop
LDC4005 5 A 12 V Yes! Yes! Int/Ext Benchtop
LDC4020 20 A 11 V Yes! Yes! Int/Ext Benchtop
  • When using a 12 V power supply.
Dual Temperature and Current Controllers
Item # Drive Current Compliance Voltage TEC Power (Max) Constant Current Constant Power Modulation Package
VITC002 25 mA 5 V >2 W Yes! - Int/Ext OEM
ITC102 200 mA >4 V 12 W Yes! Yes! Ext OEM
ITC110 1 A >4 V 12 W Yes! Yes! Ext OEM
ITC4001 1 A 11 V >96 W Yes! Yes! Int/Ext Benchtop
CLD1010LPa 1.0 A >8 V >14.1 W Yes! Yes! Ext Benchtop
CLD1011LPb 1.0 A >8 V >14.1 W Yes! Yes! Ext Benchtop
CLD1015c 1.5 A >4 V >14.1 W Yes! Yes! Ext Benchtop
ITC4002QCLd 2 A 17 V >225 W Yes! Yes! Int/Ext Benchtop
ITC133 3 A >4 V 18 W Yes! Yes! Ext OEM
ITC4005 5 A 12 V >225 W Yes! Yes! Int/Ext Benchtop
ITC4005QCLd 5 A 20 V >225 W Yes! Yes! Int/Ext Benchtop
ITC4020 20 A 11 V >225 W Yes! Yes! Int/Ext Benchtop
  • Combined controller and mount for pigtailed laser diodes in TO can packages with A, D, E, or G pin codes only.
  • Combined controller and mount for pigtailed laser diodes in TO can packages with B, C, or H pin codes only.
  • Combined controller and mount for laser diodes in butterfly packages only.
  • Enhanced compliance voltage for QCL operation.

We also offer a variety of OEM and rack-mounted laser diode current & temperature controllers (OEM Modules, PRO8 Current Control Rack Modules, and PRO8 Current and Temperature Control Rack Modules).

Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Imperial Price Available
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LDS99 VDC Regulated Power Supply, 2.5 mm Phono Plug, 120 VAC
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+1 Qty Docs Part Number - Universal Price Available
EK1101 Support Documentation
EK1101Laser Diode Driver Kit Pre-Wired to Pin Style A
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EK1102 Support Documentation
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LD1100 Support Documentation
LD1100Constant Power LD Driver for A, B, D, and F Pin Styles, 250 mA Max
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LD1101 Support Documentation
LD1101Constant Power LD Driver for C, D, and F Pin Styles, 250 mA Max
$96.85
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