OEM Laser Diode Driver: Constant Power

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

LD1100 Pin Configurations

LD1101 Pin Configurations

EK110x Laser Socket Wire Harness

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EK1101 Packaging

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.