Arbitrary frequency stabilization of a diode laser based on visual Labview PID VI and sound card output

Feng Guo-Sheng, Wu Ji-Zhou†, Wang Xiao-Feng, Zheng Ning-Xuan, Li Yu-Qing, Ma Jie‡, Xiao Lian-Tuan, Jia Suo-Tang

Experimental results of the frequency stabilization using our feedback system, showing (a) time evolution of the diode laser frequency with turning on and off the frequency feedback system, and (b) Allen variance σ ( τ ) as a function of average time, used to describe the frequency stability.