张翔讲师与袁孝课题组在Optics Letters (IF 3.385)上发表研究论文

标题：Optimization of spatial filter with volume Bragggratings in photo-thermo-refractive glass
作者：Xiang Zhang, Xiao Yuan, Jiansheng Feng, Fan Gao, BaoxingXiong, and Kuaisheng Zou
摘要：
We present a method foroptimizing spatial filter performance by inserting volume Bragg gratings (VBGs)in front of the traditional spatial filters. The experimental results show thatthe cutoff frequency is modified with the insertion of VBGs. We alsodemonstrate the optimization of filtering performance in both the spatial andfrequency domains, with detailed comparison of near-field modulation, contrastratio, and power spectral density of output laser beams.