Abstract:

In order to promote the digital and intelligent development of the frequency stabilization of diode laser, a digital assistant frequency stabilization method based on C8051F020 is proposed. The variation of frequency is obtained by detecting saturated absorption signal, and the system feeds back the error amount of frequency change to the current control and temperature control to keep the frequency stabilization of the diode laser. The hardware and the software of the frequency stabilization system are outlined. Experiment shows that it can automatically achieve frequency stabilization after power on, and can work continuously and stably in the long term, and losing lock condition can be quickly locked, the stability of the laser is 8.39×10^-11(1 s), 7.99×10^-12(1 024 s).

Key words: diode laser, frequency stability, saturated absorption spectrum, micro controller unit(MCU)