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 an adjustable compliance voltage up to 15 V and an adjustable precision current limit. The QCL100 driver features a 5 MHz modulation input and a 10 Hz trimming input and is supplied from a single 24 V input.
|Laser current||0 - 650 mA||0 - 1300 mA|
|Supply voltage VS||19 V - 26 V||19 V - 26 V|
|Compliance voltage||15 V at 500 mA (13.5 V at 650 mA)||15 V at 1000 mA (13 V at 1300 mA)|
|3 dB modulation bandwidth||5 MHz||5 MHz|
|Current monitor gain||2 V/A||1 V/A|
|RMS noise (10 Hz - 1 MHz)||680 nArms||1350 nArms|
|Current noise density (1 kHz)||650 pA/√Hz||1300 pA/√Hz|
|Modulation gains||10 mA/V, 50 mA/V||20 mA/V, 100 mA/V|
|Operating temperature||0 °C - 50 °C||0 °C - 50 °C (with provided baseplate)|
|Outside Dimensions||100 mm x 68 mm x 16 mm||100 mm x 68 mm x 16 mm|
|Compatible lasers||Anode-grounded / Floating diodes||Anode-grounded / Floating diodes|
More Laser drivers
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):
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.