Design of chaotic laser driver and temperature control circuit based on ADN8810 and ADN8835

In order to obtain high stability driving current for chaotic laser and achieve high precision adjustment of chaotic laser driving current and temperature, based on the ADN8810 and ADN8835 chips, we design a chaotic laser drive and temperature control circuit for the chaotic laser. The driving current can be output from 0 to 80 mA, which satisfies the minimum regulation accuracy of 0.01 mA and a linearly adjustable drive capability. The maximum voltage value of the thermoelectric cooler (TEC) terminal can be adjusted internally in the range from 0.5 to 4.5 V to adapt to lasers with different TECs. The maximum current value of the TEC can be adjusted in the range from 0.5 to 4.3 A to protect the laser. The experimental results prove that the stability of the driving current for the circuit output is better than 0.007%, and the maximum fluctuation of the laser temperature is 0.17 ℃ within 2 hours, which can meet the needs of chaotic lasers.