title: Superposition of helical beams by using a Michelson interferometer.
abstract: Orbital angular momentum (OAM) of a helical beam is of great interests in the high density optical communication due to its infinite number of eigen-states. In this paper, an experimental setup is realized to the information encoding and decoding on the OAM eigen-states. A hologram designed by the iterative method is used to generate the helical beams, and a Michelson interferometer with two Porro prisms is used for the superposition of two helical beams. The experimental results of the collinear superposition of helical beams and their OAM eigen-states detection are presented.
authors.affiliation: School of Opto-Electronics, Beijing Institute of Technology, Beijing 100081, China. gao@bit.edu.cn
authors.forename: Chunqing
authors.initials: C
authors.lastname: Gao
authors.forename: Xiaoqing
authors.initials: X
authors.lastname: Qi
authors.forename: Yidong
authors.initials: Y
authors.lastname: Liu
authors.forename: Horst
authors.initials: H
authors.lastname: Weber
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D008027:Light; D055096:Optical Devices; D012031:Refractometry / Q000295:instrumentation*; D012542:Scattering, Radiation; D013685:Telecommunications / Q000295:instrumentation*