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Digital butterfly laser diode controller

PRODUCTS > PHOTONICS > LASER DRIVERS > DIGITAL BUTTERFLY LASER DIODE CONTROLLER
Digital butterfly laser controller
Digital butterfly laser controller CTL200 Graphical User Interface CTL200 current stability CTL200 modulation CTL200 current noise density CTL200 temperature coefficient

Koheron CTL200 is the digital version of the popular CTL101 analog laser controller. It combines a low noise current driver with modulation and a temperature controller. The CTL200 fits in a 75 mm x 75 mm square, uses a single 5.9 V supply, and can operate between 0 and 50°C. The CTL200 is conduction-cooled. It comes with an aluminum base plate and a zero insertion force socket for easy mounting. The CTL200 is also available in a screw terminal version.

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Includes

  • 5.9 V 3 A power supply

Specifications

CTL200 laser controller is available for type 1 lasers (CTL200-1-) and type 2 lasers (CTL200-2-).

B-100 B-200 B-400 B-600
Current driver
Laser current 3 - 112 mA 5 - 225 mA 10 - 450 mA 15 - 675 mA
Laser current resolution 2.5 µA 5 µA 10 µA 15 µA
Compliance voltage at max. current 3.0 V 3.0 V 3.0 V 2.9 V
RMS noise (10 Hz - 1 MHz) 130 nArms 220 nArms 430 nArms 650 nArms
Current noise density (1 kHz) 120 pA/√Hz 230 pA/√Hz 450 pA/√Hz 670 pA/√Hz
Temperature coefficient 20 ppm/°C 20 ppm/°C 20 ppm/°C 20 ppm/°C
Modulation gains 125 µA/V, 1.25 mA/V, 12.5 mA/V 250 µA/V, 2.5 mA/V, 25 mA/V 500 µA/V, 5 mA/V, 50 mA/V 750 µA/V, 7.5 mA/V, 75 mA/V
3 dB modulation bandwidth 10 MHz 10 MHz 10 MHz 10 MHz
AC modulation cutoff frequency 80 kHz 80 kHz 80 kHz 80 kHz
TEC controller
Maximum current 0.8 A 1.2 A 1.2 A 1.2 A
Compliance voltage ±3 V ±3 V ±3 V ±3 V
Temperature stability 0.002 °C/°C 0.002 °C/°C 0.002 °C/°C 0.002 °C/°C
Laser power monitor
Photodiode current 0 - 2.5 mA 0 - 2.5 mA 0 - 2.5 mA 0 - 2.5 mA
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 104 g 104 g 104 g 104 g
Supply voltage 5.7 V to 6.5 V 5.7 V to 6.5 V 5.7 V to 6.5 V 5.7 V to 6.5 V
Operating temperature 0 - 60 °C 0 - 60 °C 0 - 60 °C 0 - 50 °C
Compatible lasers Floating diodes Floating diodes Floating diodes Floating diodes

More Laser drivers

Current driver

Current stability

Current stability over 1 hour of a B-400 controller operated at 400 mA.

CTL200 current stability

Current modulation

The CTL200 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.

CTL200 DC modulation transfer function

The AC modulation input can be used to modulate the laser above 100 kHz with a modulation gain of 20 mA/V:

CTL200 AC modulation transfer function

Current noise

The figure below shows the current noise of the CTL200 controller operating at rated current with the modulation gain set to medium:

CTL200 current noise

Temperature stability

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

CTL200 temperature coefficient

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CTL200
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