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Low noise butterfly laser diode controller

PRODUCTS > PHOTONICS > LASER DRIVERS > LOW NOISE BUTTERFLY LASER DIODE CONTROLLER
Low noise butterfly laser controller
Low noise butterfly laser controller CTL101 current noise CTL101 settling time CTL101 one hour stability CTL101 modulation transfer function

Koheron CTL101 is a low noise current driver with modulation combined with a temperature controller. It is designed to drive narrow-linewidth laser diodes in butterfly package. The CTL101 fits in a 75 mm x 75 mm square, uses a single 5 V supply, and can operate between 0 and 50°C. The CTL101 is conduction-cooled. It comes with an aluminum base plate and a zero insertion force socket for easy mounting.

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Specifications

CTL101 laser controller is available for type 1 lasers (CTL101-1-) and type 2 lasers (CTL101-2-).

B-100 B-200 B-400 B-800
Current driver
Laser current 0 mA to 110 mA 0 mA to 220 mA 0 mA to 440 mA 0 mA to 880 mA
Compliance voltage (5 V power supply) 2.2 V 2.2 V 2.2 V 2.2 V
Compliance voltage (6 V power supply) 3.2 V 3.2 V 3.2 V 3.2 V
RMS noise (10 Hz to 1 MHz, L and M modulation gains) 120 nArms 200 nArms 390 nArms 810 nArms
RMS noise (10 Hz to 1 MHz, H modulation gain) 150 nArms 280 nArms 560 nArms 1160 nArms
Current noise density (1 kHz) 110 pA/√Hz 220 pA/√Hz 420 pA/√Hz 820 pA/√Hz
Current limit (L setting) 60 mA 150 mA 300 mA 600 mA
Current limit (H setting) 125 mA 250 mA 500 mA 1000 mA
Modulation gain (L setting) 0.5 mA/V 1 mA/V 2 mA/V 4 mA/V
Modulation gain (M setting) 5 mA/V 10 mA/V 20 mA/V 40 mA/V
Modulation gain (H setting) 50 mA/V 100 mA/V 200 mA/V 400 mA/V
3 dB modulation bandwidth 12 MHz 12 MHz 12 MHz 12 MHz
Temperature coefficient 15 ppm/°C 15 ppm/°C 15 ppm/°C 15 ppm/°C
Slow start (90 % setpoint) 250 ms 250 ms 250 ms 250 ms
AC modulation cutoff frequency 1.5 MHz 1.5 MHz 1.5 MHz 1.5 MHz
TEC controller
Maximum current 0.8 A 1.2 A 1.2 A 1.2 A
Temperature range (10 K thermistor) 10 °C to 35 °C 10 °C to 35 °C 10 °C to 35 °C 10 °C to 35 °C
Compliance voltage -3 V to 3 V -3 V to 3 V -3 V to 3 V -3 V to 3 V
Temperature stability 0.0015 °C/°C 0.0015 °C/°C 0.0015 °C/°C 0.0015 °C/°C
Laser power monitor
Photodiode current 0 mA to 1 mA 0 mA to 1 mA 0 mA to 1 mA 0 mA to 1 mA
Gain 3.9 V/mA 3.9 V/mA 3.9 V/mA 3.9 V/mA
Frequency range DC to 20 MHz DC to 20 MHz DC to 20 MHz DC to 20 MHz
Other
Outside dimensions 75 mm x 85 mm x 27 mm 75 mm x 85 mm x 27 mm 75 mm x 85 mm x 27 mm 75 mm x 85 mm x 27 mm
Weight 103 g 103 g 103 g 103 g
Supply voltage 4.9 V to 6.5 V 4.9 V to 6.5 V 4.9 V to 6.5 V 4.9 V to 6.5 V
Operating temperature 0 °C to 60 °C 0 °C to 60 °C 0 °C to 60 °C 0 °C to 50 °C
Compatible lasers Floating diodes Floating diodes Floating diodes Floating diodes

More Laser drivers

Current driver

The figure below shows the relative current change of the CTL101 laser controller set at 800 mA current (CTL101-2-B-800) during its first 100 hours of operation:

CTL101 early life drift

The current stability of the controller after 100 hours is shown below:

CTL101 one hour stability

After a subsequent power-on, the CTL101 controller takes only one minute to settle the laser current within 10 ppm of the setpoint value:

CTL101 settling time

Current modulation

The CTL101 controller has two current modulation inputs available on SMA connectors. The DC modulation input allows to modulate the current setpoint between DC and 10 MHz. A jumper allows to choose between 3 modulation gains (2 mA/V, 20 mA/V and 200 mA/V for the 400 mA version).

CTL101 DC modulation transfer function

The AC modulation input can be used to modulate the laser above 1 MHz with a modulation gain of 20 mA/V:

CTL101 AC modulation transfer function

Current noise

The figure below shows the current noise of the CTL101 controller operating at rated current with the modulation gain set to medium:

CTL101 current noise

Temperature stability

The figure below shows the variation of the output current against the ambient temperature for controllers operating at rated current:

CTL101 temperature coefficient

Temperature controller

The temperature controller consists of a precision Wheatstone bridge, an analog PID controller and a linear current driving stage. PID gains are fixed and have been adjusted for a typical butterfly laser diode. Temperature setpoint is adjusted with a precision trimming potentiometer.

Complementary products

Dual power supply New options

Dual power supply

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Quad-channel adjustable power supply

Quad-channel adjustable power supply

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Ordering codes

REFERENCE ATTRIBUTE
CTL101-1-B-100 Laser type 1 / Laser current 100 mA
CTL101-1-B-200 Laser type 1 / Laser current 200 mA
CTL101-1-B-400 Laser type 1 / Laser current 400 mA
CTL101-1-B-800 Laser type 1 / Laser current 800 mA
CTL101-2-B-100 Laser type 2 / Laser current 100 mA
CTL101-2-B-200 Laser type 2 / Laser current 200 mA
CTL101-2-B-400 Laser type 2 / Laser current 400 mA
CTL101-2-B-800 Laser type 2 / Laser current 800 mA

Export information

REFERENCE COUNTRY OF ORIGIN HS CODE HTSUS ECCN
CTL101-1-B-100 France 90303370 9030333800 EAR99
CTL101-1-B-200 France 90303370 9030333800 EAR99
CTL101-1-B-400 France 90303370 9030333800 EAR99
CTL101-1-B-800 France 90303370 9030333800 EAR99
CTL101-2-B-100 France 90303370 9030333800 EAR99
CTL101-2-B-200 France 90303370 9030333800 EAR99
CTL101-2-B-400 France 90303370 9030333800 EAR99
CTL101-2-B-800 France 90303370 9030333800 EAR99

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