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Low noise laser driver with external setpoint
Koheron DRV200S is an ultra-low noise current driver on which the current setpoint is controlled by an externally applied voltage. The DRV200S has variable current limit and compliance voltage. It also features a DC to 6 MHz modulation input with adjustable modulation gain.
| Quantity | Price |
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Specifications
| DRV200S-A-40 | DRV200S-A-200 | DRV200S-A-400 | |
|---|---|---|---|
| Current driver | |||
| Laser current | 0 mA to 40 mA | 0 mA to 200 mA | 0 mA to 400 mA |
| Compliance voltage(VSL = 19 V) | 15.5 V | 15.5 V | 15.5 V |
| Current noise density(1 kHz, Modulation gain M) | 55 pA/√Hz | 270 pA/√Hz | 480 pA/√Hz |
| RMS noise(10 Hz to 1 MHz) | 65 nArms | 265 nArms | 530 nArms |
| Temperature coefficient | 30 ppm/°C | 30 ppm/°C | 30 ppm/°C |
| Current monitor gain | 50 V/A | 10 V/A | 5 V/A |
| Current limit | 13 mA to 60 mA | 65 mA to 300 mA | 130 mA to 600 mA |
| Modulation | |||
| 3 dB modulation bandwidth | 8 MHz | 6 MHz | 6 MHz |
| Modulation gain(L setting) | 200 µA/V | 1 mA/V | 2 mA/V |
| Modulation gain(M setting) | 2 mA/V | 10 mA/V | 20 mA/V |
| Modulation gain(H setting) | 20 mA/V | 100 mA/V | 200 mA/V |
| Power supplies | |||
| Internal supply voltage(VSI) | 4.8 V to 6 V | 4.8 V to 6 V | 4.8 V to 6 V |
| Laser supply voltage(VSL) | 3 V to 19 V | 3 V to 19 V | 3 V to 19 V |
| Other | |||
| Outside dimensions | 58 mm x 50 mm x 14 mm | 58 mm x 50 mm x 14 mm | 58 mm x 50 mm x 14 mm |
| Weight | 19 g | 19 g | 19 g |
| Operating temperature | 0 °C to 50 °C | 0 °C to 50 °C | 0 °C to 50 °C |
| Compatible lasers | Floating diodes | Floating diodes | Floating diodes |
More Laser drivers
Characterization
Current noise
The figure below shows the current noise of the DRV200S laser driver. The setpoint is produced by a VREF100 voltage source.
Setpoint frequency reponse
DC current modulation input
Modulation performance are characterized using a DFB laser operated at 80 mA. The gain high modulation (H) is measured at 200 mVpp and the gains medium (M) and low (L) are measured at 2 Vpp. Gains are normalized to the medium modulation gain at DC.
