QCL100 Quantum cascade laser driver
Koheron QCL100 is a high-performance current driver designed to drive high-voltage loads such as Quantum Cascade Lasers. It operates as a current sink, allowing the laser anode to be connected to the ground. The QCL100 driver provides a compliance voltage adjustable up to 13.5 V and an adjustable precision current limit. The board features a 5 MHz modulation input and a 10 Hz trimming input. It is supplied from a single 24 V input and comes with an aluminum base plate.
From 975 €
Resources
Specifications
| QCL100-A-500 | QCL100-A-1000 | |
|---|---|---|
| Laser current | 0 mA to 650 mA | 0 mA to 1300 mA |
| Supply voltage | 19 V to 26 V | 19 V to 26 V |
| Compliance voltage | 13.5 V | 13 V |
| 3 dB modulation bandwidth | 5 MHz | 5 MHz |
| Current monitor gain | 2 V/A | 1 V/A |
| RMS noise10 Hz to 1 MHz | 680 nArms | 1350 nArms |
| Current noise density1 kHz | 650 pA/√Hz | 1300 pA/√Hz |
| Modulation gainLo setting | 10 mA/V | 20 mA/V |
| Modulation gainHi setting | 50 mA/V | 100 mA/V |
| Operating temperature | 0 °C to 50 °C | 0 °C to 50 °C |
| Outside dimensions | 100 mm x 68 mm x 16 mm | 100 mm x 68 mm x 16 mm |
| Weight | 130 g | 130 g |
| Compatible lasers | Anode-grounded / Floating diodes | Anode-grounded / Floating diodes |
More Laser drivers
Characterization
Current noise
Modulation
Modulation transfer function measured across a 25 Ω load at 400 mA (QCL100-A-500) and 12.5 Ω load at 1000 mA (QCL100-A-1000). Modulation input voltage amplitude is 2 Vpp.
The figure below shows the response (yellow) of the QCL100-A-500 driver to a 2 Vpp triangle modulation (green):
Current limit
The QCL100 driver integrates a fast and precise current limit. Here the current limit clamps a 10 kHz sine wave at 400 mA:
External setpoint trimming input
The external trimming input can be use to perform a low frequency modulation with a 10 Hz bandwidth.
