In order to improve the noise-reducing ability of light source,a hybrid controller using fuzzy control and proportional control simultaneously is proposed,which provides a high precise control on the output power of a laser diode with the center wavelength at 650 nm. Under the Fuzzy-P control,the experimental results show that the static stability of output power of a laser diode reache±0.48‰;and the dynamic stability is superior to±1‰.