Chinese Optics Letters, 2019, 17 (4): 040501, Published Online: Apr. 3, 2019   

Angular filtering by volume Bragg grating in photothermorefractive glass for nanosecond laser pulse Download: 964次

Baoxing Xiong 1,2,3Fan Gao 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 Jiangsu Provincial Key Laboratory of Advanced Optical Manufacturing Technologies and Key Laboratory of Modern Optical Technologies of the Ministry of Education, Suzhou 215006, China
3 Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, Suzhou 215006, China
Abstract
The two-dimensional angular filter based on volume Bragg gratings in photothermorefractive glass for a nanosecond (ns) laser pulse is demonstrated. The experimental results show that the near-field beam quality of the laser pulse was effectively improved. The near-field modulation and contrast ratio were improved by 1.75 and 4.48 times, respectively. The power spectral density curves showed that the spatial frequencies more than 0.9 mm 1 in the x direction and 1.2 mm 1 in the y direction were effectively suppressed.

Baoxing Xiong, Fan Gao, Xiang Zhang, Xiao Yuan. Angular filtering by volume Bragg grating in photothermorefractive glass for nanosecond laser pulse[J]. Chinese Optics Letters, 2019, 17(4): 040501.

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