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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Vol. 8, Iss. 2 — Feb. 1, 2010
  • pp: 134–137

High quality beam shaping by square soft-edge diaphragm combined with liquid crystal spatial light modulator

Yunfeng Ma, Zhongwei Fan, Jisi Qiu, Chengyong Feng, Tianzhuo Zhao, and Weiran Lin  »View Author Affiliations


Chinese Optics Letters, Vol. 8, Issue 2, pp. 134-137 (2010)


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Abstract

The square soft-edge diaphragm with round angle is designed by Matlab, and is sent to a liquid crystal spatial light modulator by the computer. In order to obtain precompensation for the following laser system, local diaphragm transmission can be adjusted by feedback signals of surface-channel charge-coupled device (SCCD). This method can reduce the diffraction effect and realize no modulation, high stability, high homogeneity, and large scale laser beam. Several parameters of soft-edge diaphragms which affect the laser beam quality are studied systematically, and the optimized values are obtained. The method can avoid the serious modulation of hard edges and provide soft-edge diaphragms of different shapes in a fast and convenient way for the large scale laser beam system.

© 2010 Chinese Optics Letters

OCIS Codes
(050.1220) Diffraction and gratings : Apertures
(140.3300) Lasers and laser optics : Laser beam shaping
(230.3720) Optical devices : Liquid-crystal devices

Citation
Yunfeng Ma, Zhongwei Fan, Jisi Qiu, Chengyong Feng, Tianzhuo Zhao, and Weiran Lin, "High quality beam shaping by square soft-edge diaphragm combined with liquid crystal spatial light modulator," Chin. Opt. Lett. 8, 134-137 (2010)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-8-2-134


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