Experimental study of detecting orbital angular momentum states of spiral phase beams
螺旋相位光束轨道角动量态测量的实验研究

An experimental setup was built to detect orbital angular momentum (OAM) states of light beams. The helical beams with different OAM states were generated by using a spatial light modulator. A Mach-Zehnder (M-Z) interferometer was used to detect helical beams with odd or even OAM number. Sorting of coaxial helical beams was also experimentally realized.