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Koheron CTL200-0 User manual

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CTL200-0 User Guide
Note
This guide describes the information that is specific to the screw terminal version of the CTL200. Please refer to
the CTL200 user guide for general information on the CTL200.
Terminal block connections
LD+ / LD-: Laser anode / cathode pins. If possible, use a short twisted cable to connect your laser. The
CTL200-0 is compatible with floating diodes.
VL+ / VL-: Laser anode / cathode 4-wire voltage sensing pins.
PD+ / PD-: Photodiode anode / cathode pins. PD+ is internally connected to GND.
TH+ / TH-: 10K thermistor pins.
TEC+ / TEC-: Connections to the Peltier element.
AI1, AI2: Auxiliary analog inputs between 0 and 2.5 V.
DO1, DO2: Digital outputs that replicate the status of LASER and TEMP LEDs on 3V3 logic levels.
Modulation input
DC modulation input for modulation between DC and 10 MHz. Modulation range is ±1 V. A jumper allows to
choose between 3 modulation gains.
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Power supply
The board must be supplied at the VS pin with a voltage between 7.5 V and 12.5 V.
Adjusting the compliance voltage
The switches SW3 and SW4 of the configuration switch are used to adjust the compliance voltage. The figure
below shows the maximum laser voltage vs. current for the 4 compliance voltage configurations.
CTL200-0-B-200 compliance voltage
CTL200-0-B-400 compliance voltage
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CTL200-0-B-600 compliance voltage
Make sure to use the lowest possible compliance voltage configuration in order to minimize the power
consumption.
Serial interface
Information related to the serial interface can be found on the CTL200 user guide.
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