FM-to-AM conversion in angular filtering based on transmitted volume Bragg gratings
FM-to-AM conversion in angular filtering based on transmitted volume Bragg gratings
复制标题
基于透射体布拉格光栅的角度滤波中的 FM 至 AM 转换
DOI：
10.1017/hpl.2019.22
复制
发表时间：
2019
影响因子：
4.8
通讯作者：
Yuan Xiao
中科院分区：
文献类型：
--
作者：
Gao Fan;Xiong Baoxing;Zhang Xiang;Yuan Xiao
讨论了基于透射体布拉格光栅（TBG）的调频-调幅角滤波转换。模拟结果表明，窄的TBG光谱选择性导致更强的FM到AM转换。通过控制光栅的周期和厚度，可以获得较好的角度选择性和较宽的带宽。该滤波器能有效地抑制FM到AM的转换，使滤波后光束的畸变标准降低到5%以下。在“神光”装置上进行了TBG的FM-AM转换实验，实验结果与模拟结果吻合较好。
FM-to-AM conversion for angular filtering based on transmitted volume Bragg gratings (TBGs) is discussed. Simulation results show that a narrower spectral selectivity of TBGs led to stronger FM-to-AM conversion. Good angular selectivity and a wide bandwidth for the TBGs can be obtained by controlling the grating period and thickness. FM-to-AM conversion can be effectively suppressed and the distortion criterion for the filtered beam reduces to less than 5%. FM-to-AM conversion of TBGs is demonstrated in the ‘Shenguang’ facility, and the results are in good agreement with the simulation.