Abstract
High-contrast filtering via multiple reflections between matched volume Bragg gratings (VBGs) is demonstrated. The use of multiple reflections serves to increase the suppression ratio of the out-of-band spectral content such that contributions of grating sidelobes can be mitigated. The result is a device that retains spectral and angular selectivity and diffracts light into a single order with high efficiency but reshapes the spectral/angular response to achieve higher signal-to-noise ratios. We demonstrate that multipass spectral filters can be recorded with extremely high suppression ratios using reflecting Bragg gratings (RBGs) in three different configurations. These filters demonstrate roll-offs of over 150 dB/nm. Similarly, we demonstrate angular filtering by multipass transmitting gratings.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Peng Chen, Yunxia Jin, Dongbing He, Junming Chen, Jiao Xu, Huifang Dai, Jingyin Zhao, Fanyu Kong, and Hongbo He
Appl. Opt. 58(10) 2500-2504 (2019)
Derrek R. Drachenberg, Oleksiy Andrusyak, George Venus, Vadim Smirnov, and Leonid B. Glebov
Appl. Opt. 53(6) 1242-1246 (2014)
Xiang Zhang, Jiansheng Feng, Baoxing Xiong, Kuaisheng Zou, and Xiao Yuan
Opt. Express 22(7) 8291-8297 (2014)