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Low noise laser driver with external setpoint

PRODUCTS > PHOTONICS > LASER DRIVERS > LOW NOISE LASER DRIVER WITH EXTERNAL SETPOINT
DRV200S - low noise laser driver with external setpoint
DRV200S - low noise laser driver with external setpoint DRV200S - Current noise DRV200S - Modulation bandwidth

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.

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Specifications

DRV200S-A-40 DRV200S-A-200 DRV200S-A-400
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

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Characterization

Current noise

The figure below shows the current noise of the DRV200S laser driver. The setpoint is produced by a VREF100 voltage source.

DRV200S current noise

Setpoint frequency reponse

DRV200S setpoint frequency response

DC current modulation input

DRV200S-A-200 Laser driver modulation transfer function for the 200 mA laser current version
Transfer functions of the modulation input. 200 mA laser current version (A-200)
DRV200S-A-400 Laser driver modulation transfer function for the 400 mA laser current version
Transfer functions of the modulation input. 400 mA laser current version (A-400)

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.

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DRV200S
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