[4] Hao Qun, Li Dacheng, Wang Yongtian. High-accuracy long distance alignment using single-mode optical fiber and phase plate. Opt. & Laser Technol., 2002, 34(4):287～292

[6] Ganesan A R, Venkateswarlu P. Laser beam collimation using Talbot interferometry. Appl. Opt., 1993, 32:2918～2920

[7] Mehta D S, Kandpal H C. A simple method for testing laser beam collimation. Opt. & Laser Technol., 1997, 29(8): 469～473