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.

Note on Cosmetic Appearance
The physical appearance of the board-level components on the LD1100 and LD1101 drivers may vary from that pictured above. Regardless of their appearance, the drivers conform to the electrical and operational specifications described here.

Supported Pin Configurations

LD1100 Pin Configurations

LD1101 Pin Configurations

EK110x Laser Socket Wire Harness

Click to Enlarge
EK1101 Packaging

Smart Pack

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

Thorlabs' Smart Pack Initiative is aimed at minimizing waste while providing adequate protection for our products. By eliminating any unnecessary packaging, implementing design changes, and utilizing eco-friendly materials, this initiative seeks to reduce the environmental impact of our product packaging.

The updated EK1101 and EK1102 packaging primarily consists of recycled paper and cardboard and weighs 19.70% less than the original packaging. This weight change results in a 3.79 kg reduction in travel-based CO₂ emissions per year, based on typical product sales.

As we move through our product line, we will indicate re-engineered, eco-friendly packaging with our Smart Pack logo, which can be seen above.

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			External	Benchtop
VLDC002	25 mA	5 V		-	Int/Ext	OEM
LDC201CU	100 mA	5 V			External	Benchtop
LD2000R	100 mA	3.5 V	-		External	OEM
EK2000	100 mA	3.5 V	-		External	OEM
LDC202C	200 mA	10 V			External	Benchtop
KLD101	230 mA	≤10 V			External	K-Cube™
IP250-BV	250 mA	8 Va			External	OEM
LD1100	250 mA	6.5 Va	-		--	OEM
LD1101	250 mA	6.5 Va	-		--	OEM
EK1101	250 mA	6.5 Va	-		--	OEM
EK1102	250 mA	6.5 Va	-		--	OEM
LD1255R	250 mA	3.3 V		-	External	OEM
LDC205C	500 mA	10 V			External	Benchtop
IP500	500 mA	3 V			External	OEM
LDC210C	1 A	10 V			External	Benchtop
LDC220C	2 A	4 V			External	Benchtop
LD3000R	2.5 A	--		-	External	OEM
LDC240C	4 A	5 V			External	Benchtop
LDC4005	5 A	12 V			Int/Ext	Benchtop
LDC4020	20 A	11 V			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		-	Int/Ext	OEM
ITC102	200 mA	>4 V	12 W			Ext	OEM
ITC110	1 A	>4 V	12 W			Ext	OEM
ITC4001	1 A	11 V	>96 W			Int/Ext	Benchtop
CLD1010LPa	1.0 A	>8 V	>14.1 W			Ext	Benchtop
CLD1011LPb	1.0 A	>8 V	>14.1 W			Ext	Benchtop
CLD1015c	1.5 A	>4 V	>14.1 W			Ext	Benchtop
ITC4002QCLd	2 A	17 V	>225 W			Int/Ext	Benchtop
ITC133	3 A	>4 V	18 W			Ext	OEM
ITC4005	5 A	12 V	>225 W			Int/Ext	Benchtop
ITC4005QCLd	5 A	20 V	>225 W			Int/Ext	Benchtop
ITC4020	20 A	11 V	>225 W			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).