Low noise laser diode driver with modulation
Koheron DRV200 drivers are ultra-low noise current drivers combining a very stable current bias with a +/-1 V modulation input from DC to 5 MHz. Current bias can be set from 0 to 200 mA with a manual potentiometer. A jumper allows to choose between 3 modulation gains.
275 €
DRV200-A-200
0-200 mA laser current
| Quantity | Price |
|---|---|
| 1+ | 275 € |
| 4+ | 245 € |
| 20+ | 195 € |
Resources
Specifications
| Reference |
DRV200-A-200 |
DRV200-A-40 |
|---|---|---|
| Laser current | 0 - 200 mA | 0 - 40 mA |
| Supply voltage VS | 5 V (4.6 V - 5.5 V) | 5 V (4.6 V - 5.5 V) |
| Compliance voltage | 3 V at 100 mA, 2 V at 200 mA | 3 V at 20 mA, 2 V at 40 mA |
| 3 dB modulation bandwidth | 6 MHz | 8 MHz |
| Current monitor gain | 20 mV / mA (at IMON) | 100 mV / mA (at IMON) |
| Temperature coefficient | 15 ppm / °C (up to 20 ppm / °C) | 15 ppm / °C (up to 20 ppm / °C) |
| RMS noise (10 Hz - 1 MHz) | 255 nArms | 65 nArms |
| Current noise density (1 kHz) | 270 pA / Hz1/2 | 55 pA / Hz1/2 |
| Current limit | 200 mA | 42 mA |
| Slow start (90 % setpoint) | 990 ms | 990 ms |
| Modulation gains | 1 mA / V, 10 mA / V, 100 mA / V | 200 µA / V, 2 mA / V, 20 mA / V |
| Dimensions | 62 mm x 38 mm x 12 mm | 62 mm x 38 mm x 12 mm |
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Characterization
Noise performance
The figure below shows the current noise of the DRV200-A-200 (in blue) for a current setpoint of 80 mA:
Current noise was measured across a 30 Ω precision resistor sensed with a 5000 V/V instrumentation amplifier. The resulting noise floor is below 60 pA/Hz1/2.
Current noise integrated from 10 Hz to 1 MHz is 224 nArms. The noise of the Koheron DRV100 (293 nArms) is shown for comparison.
Modulation performance
Modulation performance was characterized with a DFB laser controlled with a current bias of 50 mA (IMON = 1 V). The DRV200-A-200 modulation gain is set to 100 mA/V. A waveform generator controls the driver with a sine wave modulation of 500 mVpp, resulting in a current modulation between 25 and 75 mA. The modulation is then detected by a 150 MHz bandwidth PD100 photodetector and observed on a spectrum analyzer:
The frequency response of the system is shown below. 3 dB modulation bandwidth is 6.8 MHz.
