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.

© 2019 Chinese Laser Press

Two-dimensional angular filtering by volume Bragg gratings in photothermorefractive glass

Xiang Zhang, Xiao Yuan, Shang Wu, Jiansheng Feng, Kuaisheng Zou, and Guiju Zhang
Opt. Lett. 36(11) 2167-2169 (2011)

Stable coherent coupling of laser diodes by a volume Bragg grating in photothermorefractive glass

George B. Venus, Armen Sevian, Vadim I. Smirnov, and Leonid B. Glebov
Opt. Lett. 31(10) 1453-1455 (2006)

Wavefront distortion optimized with volume Bragg gratings in photothermorefractive glass

Fan Gao, Xiang Zhang, Xiaojie Sun, and Xiao Yuan
Opt. Lett. 41(6) 1082-1085 (2016)

High-frequency Bragg gratings in a photothermorefractive glass

O. M. Efimov, L. B. Glebov, and V. I. Smirnov
Opt. Lett. 25(23) 1693-1695 (2000)

High-efficiency Bragg gratings in photothermorefractive glass

Oleg M. Efimov, Leonid B. Glebov, Larissa N. Glebova, Kathleen C. Richardson, and Vadim I. Smirnov
Appl. Opt. 38(4) 619-627 (1999)