[1] [1] C. E. Wieman, L. Hollberg. Using diode lasers for atomic physics [J]. Rev. Sci. Instrum., 1991, 62(1):1～20

[2] [2] Yang Haijing, Wang Yanhua, Zhang Tiancai et al.. Modulation-free frequency stabilization of a laser based on a confocal Fabry-Perot cavity [J]. Chinese J. Lasers, 2006, 33(3):316～320

[3] [3] Ma Jie, ZhaoYanting, Zhao Jianming et al.. Frequency stabilization of an external cavity diode laser using polarization spectroscopy without frequency modulation [J]. Chinese J. Lasers, 2005, 32(12):1605～1608

[4] [4] Zhao Jianming, Yin Wangbao, Zhao Yanting et al.. Frequency locking of a semiconductor laser via radio-frequency modulation spectrum[J]. Chinese J. Lasers, 2004, 31(8): 935～938

[5] [5] Dou Haipeng, Dong Lei, Zhang Lei et al.. Modulation-free laser frequency locking by acousto-optic frequency-shifting for dense wavelength division multiplexing[J]. Chinese J. Lasers, 2007, 34(10):1375～1378

[6] [6] Li Tianchu, Li Mingshou, Lin Pingwei. NIM4 laser cooling-cesium atomic fountain clock: a new generation of time and frequency primary standard [J]. Acta Metrologica Sinica, 2004, 25(3):193～197

[7] [7] A.J. Wallard. Frequency stabilization of helium-neon laser by saturated absorption in iodine vapor [J]. J. Phys. E: Scient. Instr., 1972, 5(9):926～930

[8] [8] Zeng Qingyong. Weak Signal Testing[M]. 2nd Version Hangzhou: Zhejiang University Press, 1994. 53～56

[9] [9] Zhang Xinfa, Liu Fu, Dai Yisong. Study on DPSD algorithm performance with parameter selection [J]. Journal of Jilin University of Technology, 1998, 28:40～45