Design of laser-s driven circuit based on MCU

In order to more effectively control and adjust the temperature and the power of the laser, we designed a kind of laser driven circuit based on STC11F08XE micro controller unit (MCU),which had the ability of temperature control and power control. The chip ADN8830 and ADN2830 were used to realized the control of temperature and power, respectively .At the same time, the laser output power could be manually changed. The experimental results show that the temperature control module of this system can stably control the laser-s temperature, and make sure the target temperature error less than 0.01 ℃. And the wavelength can be adjusted between 1 535.17 nm~1 563.24 nm. The power control module can implement manual control and make the laser power change between 0 dBm~10 dBm with the error of 0 mW~0.05 mW.