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

Frequency of the locked diode laser versus time. The preset target frequency is tuned to a specific value of 384.272184 THz, and the evolution of diode laser frequency with time over 21 minutes, the inset shows laser frequency in the first one minute.