Experimental research on spatial filtering of deformed laser beam by transmitting volume Bragg grating

• 来源期刊: 中国光学快报（英文版）
• 年，卷（期）: 2011,（3）
• 页码范围: 5-7
• 页数: 3页
• 语种: 英文
• DOI: 10.3788/COL201109.030501.

摘要

Using transmitting volume Bragg gratings (TVBG) as a basis, an experiment on one-dimensional spatial filtering of a deformed laser beam is designed.The deformed laser beam results from a He-Ne laser beam modulated by an amplitude modulation plate with a spatial frequency of 7.2 mm-1.Results show that when the central wave vector of the deformed beam satisfies the Bragg law of TVBG, the spatial profile of the -1st forward-diffracted order is similar to that of the undeformed He-Ne laser beam due to the TVBG with a spatial frequency selective bandwidth of less than 5.0 mm-1.The higher frequency components of the deformed beam are filtered out in the optical near field.Thus, the TVBG cleanup of the spatially-deformed laser beam is realized experimentally.