Low noise laser diode driver with modulation

DRV200 - 200 mA low noise laser diode driver

265 €

Ref.: DRV200-A-200

Quantity	Price
1+	265 €
5+	245 €
25+	225 €

Option:

Koheron DRV200 is an ultra-low noise current driver that combines a very stable current bias with a +/-1 V modulation input from DC to 5 MHz. Current bias can be set from 0 to 200 mA with a manual potentiometer. A jumper allows to choose between 3 modulation gains: 1 mA/V, 10 mA/V or 100 mA/V.

Product details

Parameter	Min	Typ.	Max	Unit	Note
Laser current	0		200	mA
Supply voltage V_S	4.6	5	5.5	V
Compliance voltage at 100 mA		3		V
Compliance voltage at 200 mA		2		V
3 dB modulation bandwidth		6.8		MHz
Current monitor gain		20		mV / mA	measured at IMON pin
Temperature coefficient		15	20	ppm / °C
RMS noise (10 Hz - 1 MHz)		230		nA_rms
Current noise density (1 kHz)		240		pA / Hz^1/2
Current limit		200		mA
Slow start (90 % setpoint)		990		ms

Modulation gains: 1 mA / V, 10 mA / V, 100 mA / V
Dimensions: 62 mm x 38 mm x 12 mm

Laser current: 0 - 200 mA
Supply voltage V_S: 5 V (4.6 - 5.5 V)
Compliance voltage at 100 mA: 3 V
Compliance voltage at 200 mA: 2 V
3 dB modulation bandwidth: 6.8 MHz
Current monitor gain: 20 mV / mA (measured at IMON pin)
Temperature coefficient: 15 ppm / °C max. 20 ppm / °C (max. 20 ppm / °C)
RMS noise (10 Hz - 1 MHz): 230 nA_rms
Current noise density (1 kHz): 240 pA / Hz^1/2
Current limit: 200 mA
Slow start (90 % setpoint): 990 ms
Modulation gains: 1 mA / V, 10 mA / V, 100 mA / V
Dimensions: 62 mm x 38 mm x 12 mm

Parameter	Min	Typ.	Max	Unit	Note
Laser current	0		40	mA
Supply voltage V_S	4.6	5	5.5	V
Compliance voltage at 20 mA		3		V
Compliance voltage at 40 mA		2		V
3 dB modulation bandwidth		6.5		MHz
Current monitor gain		100		mV / mA	measured at IMON pin
Temperature coefficient		15	20	ppm / °C
RMS noise (10 Hz - 1 MHz)		60		nA_rms
Current noise density (1 kHz)		48		pA / Hz^1/2
Current limit		42		mA
Slow start (90 % setpoint)		990		ms

More laser diode drivers

Low noise laser diode driver

95 €

Characterization

Noise performance

The figure below shows the current noise of the DRV200-A-200 (in blue) for a current setpoint of 80 mA:

Current noise measurement

Current noise was measured across a 30 Ω precision resistor sensed with a 5000 V/V instrumentation amplifier. The resulting noise floor is below 60 pA/Hz^1/2.

Current noise integrated from 10 Hz to 1 MHz is 224 nA_rms. The noise of the Koheron DRV100 (293 nA_rms) is shown for comparison.

Modulation performance

Modulation performance was characterized with a DFB laser controlled with a current bias of 50 mA (IMON = 1 V). The DRV200-A-200 modulation gain is set to 100 mA/V. A waveform generator controls the driver with a sine wave modulation of 500 mVpp, resulting in a current modulation between 25 and 75 mA. The modulation is then detected by a 150 MHz bandwidth PD100 photodetector and observed on a spectrum analyzer:

Modulation setup