Study on Beam Quality Degradation and Correction Characteristics of Fiber Spectral Beam Combining System

Citation

• Authors: 李志慧, 张凯, 胡武利, 冯明霞, 贾凯, 钟哲强, 张彬
• Year: 2025
• Title (Chinese): 光纤阵列光谱合成系统的光束质量退化及校正特性研究
• Title (English - from Abstract): Study on Beam Quality Degradation and Correction Characteristics of Fiber Spectral Beam Combining System
• Journal (Chinese): 中国激光
• Journal (English): Chinese Journal of Lasers
• Volume: 52
• Issue: 11
• Article Number/Page: 1105003
• Online First Publication Date: 2025-03-25
• Online First Publication Link: https://link.cnki.net/urlid/31.1339.TN.20250324.1728.044
• DOI: 10.3788/CJL250509

Keywords

• 光纤阵列 / Fiber array
• 光谱合成 / Spectral Beam Combining, SBC
• 光束质量 / Beam quality
• 热效应 / Thermal effect
• 自适应光学 / Adaptive Optics
• 退化 / Degradation
• 校正特性 / Correction characteristics
• 非完善因素 / Imperfect factors
• 光源发散角 / Light source divergence angle
• 指向角 / Pointing angle/Rotation angle
• 光栅 / Grating/Multilayer dielectric grating, MDG
• 热像差 / Thermal aberration
• 内光路 / Internal optical path

Brief

This research paper investigates the degradation of beam quality in fiber array spectral beam combining (SBC) systems due to various non-ideal factors and explores the effectiveness of adaptive optics (AO) in correcting these degradations, finding that AO effectively compensates for common-path thermal aberrations and partially corrects non-common path phase perturbations.

Summary

This paper investigates how imperfections in fiber array spectral beam combining (SBC) systems, such as non-common path phase perturbations from individual fiber lasers and common path thermal aberrations in optical components like the grating and internal path, degrade the quality of the combined laser beam. The authors developed a physical model to simulate these effects and explored the use of adaptive optics (AO) to improve beam quality. Their findings show that AO can effectively compensate for common path thermal aberrations and provide some correction for non-common path phase perturbations, although managing the initial imperfections in the system is still crucial for achieving high beam quality.

Origin: https://link.cnki.net/urlid/31.1339.TN.20250324.1728.044