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
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.