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Low noise laser diode driver with modulation

PRODUCTS > PHOTONICS > LASER DRIVERS > LOW NOISE LASER DIODE DRIVER WITH MODULATION
DRV200 Low noise laser diode driver with modulation
DRV200 Low noise laser diode driver with modulation DRV200 Low noise laser diode driver with modulation current noise DRV200 Low noise laser diode driver with modulation modulation response DRV200 Low noise laser diode driver with modulation 40h current stability DRV200 Low noise laser diode driver with modulation temperature coefficient

Koheron DRV200 drivers are ultra-low noise current drivers combining a very stable current bias with a ±1 V modulation input from DC to 6 MHz. Current bias can be set from 0 to 200 mA with a manual potentiometer. A jumper allows to choose between 3 modulation gains.

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Specifications

DRV200-A-40 DRV200-A-200 DRV200-A-400
Laser current 0 mA to 40 mA 0 mA to 200 mA 0 mA to 400 mA
Supply voltage 5 V or 6 V 5 V or 6 V 5 V or 6 V
Compliance voltage at 50% max. current(5 V power supply) 2.8 V 2.8 V 2.8 V
Compliance voltage at max. current(5 V power supply) 1.8 V 1.8 V 1.8 V
Compliance voltage at 50% max. current(6 V power supply) 3.8 V 3.8 V 3.8 V
Compliance voltage at max. current(6 V power supply) 2.8 V 2.8 V 2.8 V
3 dB modulation bandwidth 8 MHz 6 MHz 6 MHz
Current monitor gain(up to max. current) 100 V/A 20 V/A 10 V/A
Temperature coefficient 30 ppm/°C 30 ppm/°C 30 ppm/°C
RMS noise(10 Hz to 1 MHz) 65 nArms 255 nArms 530 nArms
Current noise density(1 kHz, Modulation gain M) 55 pA/√Hz 270 pA/√Hz 480 pA/√Hz
Current limit(L setting) 32 mA 160 mA 320 mA
Current limit(H setting) 48 mA 240 mA 480 mA
Modulation gain(L setting) 200 mA/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
Operating temperature 0 °C to 50 °C 0 °C to 50 °C 0 °C to 50 °C
Outside dimensions 72 mm x 38 mm x 14 mm 72 mm x 38 mm x 14 mm 72 mm x 38 mm x 14 mm
Weight 19 g 19 g 19 g
Compatible lasers Floating diodes Floating diodes Floating diodes

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Characterization

Current noise

The figure below shows the current noise of the different DRV200 laser driver variants operated at a maximum rated current:

DRV200 Low noise laser diode driver with modulation current noise
DRV200 current noise

Current noise was measured across a 30 Ω resistor for the 40 mA laser current version (A-40) and a 5 Ω resistor for the 200 mA laser current version (A-200) and for the 400 mA laser current version (A-400).

Current stability

The figure below shows the current evolution of the 200 mA laser current version driver (A-200) delivering 200 mA over 40 hours. The ambient temperature is 25 °C. Current is measured using a 5 Ω precision resistor and a 7.5-digit digital voltmeter.

DRV200-A-200 Low noise laser diode driver with modulation 40h current stability
DRV200-A-200 40h current stability

Fluctuation is about 10 ppm per day.

Temperature coefficient

The figure below shows the current variation for different ambient temperatures between 5 °C and 55 °C. Temperature coefficient is below 30 ppm/°C.

DRV200-A-200 Low noise laser diode driver with modulation temperature coefficient
DRV200-A-200 temperature coefficient

DC current modulation input

The DC modulation input controls the current setpoint. It combines large bandwidth and high linearity.

DRV200-A-40 Low noise laser diode driver with modulation modulation response
DRV200-A-40 (40 mA) modulation response
DRV200-A-200 Low noise laser diode driver with modulation modulation response
DRV200-A-200 (200 mA) modulation response
DRV200-A-400 Low noise laser diode driver with modulation modulation response
DRV200-A-400 (400 mA) modulation response

Modulation performance are characterized using a DFB laser. Large and small signal correspond to a modulation signal of 2 Vpp and 500 mVpp, respectively. The modulation is detected by a 70 MHz DC coupled PD100 photodetector and measured on an oscilloscope.

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Ordering codes

PRODUCT NUMBER ATTRIBUTE
DRV200-A-40 Laser current 40 mA
DRV200-A-200 Laser current 200 mA
DRV200-A-400 Laser current 400 mA

Export information

PRODUCT NUMBER COUNTRY OF ORIGIN HS CODE HTSUS ECCN
DRV200-A-40 France 90303370 9030333800 EAR99
DRV200-A-200 France 90303370 9030333800 EAR99
DRV200-A-400 France 90303370 9030333800 EAR99

Revision history

  • 2 - July 2018: Add jumpers for selection of current limit (High / Low) and supply voltage (5 V / 6 V).

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