Chinese Optics Letters, 2018, 16 (9): 091001, Published Online: Sep. 6, 2018   

On-line beam diagnostics based on single-shot beam splitting phase retrieval Download: 708次

Author Affiliations
1 Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
Abstract
We propose a novel on-line beam diagnostic method based on single-shot beam splitting phase retrieval. The incident beam to be measured is diffracted into many replicas by a Dammann grating and then propagates through a weakly scattering phase plate with a known structure; the exiting beams propagate along their original direction and form an array of diffraction patterns on the detector plane. By applying the intensity of diffraction patterns into an iterative algorithm and calculating between the grating plane, weakly scattering plane, and detector plane, the complex field of the incident beam can be reconstructed rapidly; the feasibility of this method is verified experimentally with wavelengths of 1053 and 632.8 nm.

Xi He, Cheng Liu, Jianqiang Zhu. On-line beam diagnostics based on single-shot beam splitting phase retrieval[J]. Chinese Optics Letters, 2018, 16(9): 091001.

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