Simulation analysis of spatial transmission of backward stimulated Brillouin scattered light in high power laser facilities

Yizhang Ai; Zairu Ma; Ping Li; Bo Ren; Fang Wang; Hongjie Liu; Yuan Chen; Tianran Zheng; Laixi Sun; Xuewei Deng

doi:10.1117/12.2656458

16 December 2022 Simulation analysis of spatial transmission of backward stimulated Brillouin scattered light in high power laser facilities

Yizhang Ai, Zairu Ma, Ping Li, Bo Ren, Fang Wang, Hongjie Liu, Yuan Chen, Tianran Zheng, Laixi Sun, Xuewei Deng

Author Affiliations +

Proceedings Volume 12501, Seventeenth National Conference on Laser Technology and Optoelectronics; 125010X (2022) https://doi.org/10.1117/12.2656458
Event: Seventeenth National Conference on Laser Technology and Optoelectronics, 2022, Shanghai, China

Abstract

Backward light by stimulated Brillouin scattering (SBS) induces the final transport mirror laser damage, which has been considered a bottleneck problem in developing high-power and high-energy laser facilities. In this work, an improved continuous phase plate (CPP) model and a backward SBS model were established based on the G-S algorithm and the Fresnel diffraction transmission algorithm to simulate the backward SBS to the final transport mirror. This study discussed the propagation characteristics of backward SBS. The research results showed that the distribution of the backward SBS transmitted to the final transport mirror was determined by the phase structure of the continuous phase plate attached to the back-transmission process. By optimizing the CPP design, reducing the transmission distance, reducing the intensity modulation, and controlling the phase of the incident beam, the modulation of backward SBS can be suppressed, which has great significance in improving the laser-induced damage threshold to the final transport mirror.

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Yizhang Ai, Zairu Ma, Ping Li, Bo Ren, Fang Wang, Hongjie Liu, Yuan Chen, Tianran Zheng, Laixi Sun, and Xuewei Deng "Simulation analysis of spatial transmission of backward stimulated Brillouin scattered light in high power laser facilities", Proc. SPIE 12501, Seventeenth National Conference on Laser Technology and Optoelectronics, 125010X (16 December 2022); https://doi.org/10.1117/12.2656458

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