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Low noise cathode-grounded laser driver

PRODUCTS > PHOTONICS > LASER DRIVERS > LOW NOISE CATHODE-GROUNDED LASER DRIVER
DRV300 - Low noise cathode-grounded laser driver
DRV300 - Low noise cathode-grounded laser driver DRV300 - Current noise DRV300 - Modulation response

Koheron DRV300 is a low noise current driver for cathode-grounded laser diodes. It drives up to 200 mA laser current and features a DC to 10 MHz modulation input with adjustable modulation gain. A precision trimming input enables fine external tuning of the laser current. The 10 mA max. output current model with its ultra-low noise is well suited to drive Vertical-Cavity Surface-Emitting Lasers (VCSEL).

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Specifications

DRV300-A-10 DRV300-A-40 DRV300-A-200
Laser current 0 - 10 mA 0 - 40 mA 0 - 200 mA
Current driver
Maximum compliance voltage 4.0 V 4.0 V 4.0 V
Slow start (90 % setpoint) 800 ms 800 ms 800 ms
Current limit (H / L) 11 mA (Fixed) 44 mA / 25 mA 220 mA / 160 mA
RMS noise (10 Hz - 1 MHz) 25 nArms 75 nArms 350 nArms
Current noise density (1 kHz) 23 pA/√Hz 70 pA/√Hz 340 pA/√Hz
Temperature coefficient 50 ppm/°C 50 ppm/°C 50 ppm/°C
Modulation input
3 dB bandwidth 10 MHz 10 MHz 10 MHz
Gains 40 µA/V, 200 µA/V, 1 mA/V 160 µA/V, 800 µA/V, 4 mA/V 800 µA/V, 4 mA/V, 20 mA/V
Input range -1.2 V / +2 V -1.2 V / +2 V -1.2 V / +2 V
Input impedance 50 Ω 50 Ω 50 Ω
Trimming input
Gain 500 µA/V 2 mA/V 10 mA/V
Bandwidth 10 Hz 10 Hz 10 Hz
Input range ±2 V ±2 V ±2 V
Input impedance 2 kΩ 2 kΩ 2 kΩ
Current monitor output
Gain 100 V/A 25 V/A 5 V/A
Bandwidth 250 Hz 250 Hz 250 Hz
Output impedance 1 kΩ 1 kΩ 1 kΩ
Power supply
Supply voltage 8.5 V - 12 V (9 V nomimal) 8.5 V - 12 V (9 V nomimal) 8.5 V - 12 V (9 V nomimal)
Quiescent current (laser disabled) 10 mA 10 mA 10 mA
Quiescent current (laser enabled) 60 mA 60 mA 60 mA
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 -20 - 70 °C -20 - 70 °C -20 - 70 °C
Compatible lasers Floating and cathode-grounded diodes Floating and cathode-grounded diodes Floating and cathode-grounded diodes

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Characterization

Current noise

The figure below shows the current noise density of DRV300 laser drivers operated at their rated current.

DRV300 current noise

Current stability

The figure below shows the current stability of the DRV300-A-200 laser driver driving 200 mA.

DRV300 current stability

Modulation frequency response

The figure below shows the modulation frequency response of the DRV300-A-200 laser driver driving 200 mA.

DRV300 modulation frequency response

Trimming input frequency response

The stiff 10 Hz low-pass filter (> 80 dB rejection at 1 kHz) rejects wideband noise that could be injected by the trimming signal.

DRV300 trimming input frequency response

Combining multiple DRV300 laser drivers

Thanks to the cathode-grounded architecture of the driver, multiple DRV300 laser drivers can be mounted in parallel to increase output current. The DRV300 can also be mounted in parallel with any other cathode-grounded current driver such as the DRV110 Ultra low noise high-voltage laser driver.

The figure below shows the current noise density for 1, 2 and 3 DRV300-A-200 driver(s) mounted in parallel, with each driver operating at 200 mA:

Current noise density of DRV300 laser drivers mounted in parallel

Current noise density increases with the square root of the number of drivers (323, 455 and 560 pA/√Hz for 1, 2 and 3 drivers, respectively).

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Export information

HS code 9030.33.70
Country of Origin France

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DRV300
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