A Laser Diode Driving Board With Precise Temperature Control Circuit For Mdi-Qkd Experiment

We present a laser board for quantum communication, which integrates a high-speed driving signal for laser diode (LD) and a temperature control circuit. Our laser pulses maintain a signal-to-noise ratio of more than 30dB at a frequency up to 1.25GHz. And the temperature noise of the controlled laser diode less than 1mK RMS within 1hour.