High Power Laser Science and Engineering, 2019, 7 (2): 02000e34, Published Online: Jun. 24, 2019   

FM-to-AM conversion in angular filtering based on transmitted volume Bragg gratings Download: 682次

Fan Gao 1,2,3Baoxing Xiong 1,2,3Xiang Zhang 1,2,3,†Xiao Yuan 1,2,3
Author Affiliations
1 School of Optoelectronic Science and Engineering, Soochow University, Suzhou 215006, China
2 Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
3 Key Laboratory of Advanced Optical Manufacturing Technologies of Jiangsu Province and Key Laboratory of Modern Optical Technologies of Ministry of Education, Suzhou 215006, China
Abstract
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.

Fan Gao, Baoxing Xiong, Xiang Zhang, Xiao Yuan. FM-to-AM conversion in angular filtering based on transmitted volume Bragg gratings[J]. High Power Laser Science and Engineering, 2019, 7(2): 02000e34.

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