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 5 MHz modulation input with adjustable modulation gain.
|Laser current||0 - 40 mA||0 - 200 mA||0 - 400 mA|
|Internal supply voltage (VSI)||4.8 V - 6 V||4.8 V - 6 V||4.8 V - 6 V|
|Laser supply voltage (VSL)||3 V - 19 V||3 V - 19 V||3 V - 19 V|
|Maximum compliance voltage||15.5 V||15.5 V||15.5 V|
|3 db modulation bandwidth||8 MHz||6 MHz||6 MHz|
|Current monitor gain||50 mV/mA||10 mV/mA||5 mV/mA|
|Temperature coefficient||30 ppm/°C||30 ppm/°C||30 ppm/°C|
|RMS noise (10 Hz - 1 MHz)||65 nArms||265 nArms||530 nArms|
|Current limit||13 - 60 mA||65 - 300 mA||130 - 600 mA|
|Slow start (90 % setpoint)||1.0 s||1.0 s||1.0 s|
|Modulation gains||200 µA/V, 2 mA/V, 20 mA/V||1 mA/V, 10 mA/V, 100 mA/V||2 mA/V, 20 mA/V, 200 mA/V|
|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 - 50 °C||0 - 50 °C||0 - 50 °C|
|Compatible lasers||Floating diodes||Floating diodes||Floating diodes|
More Laser drivers
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.