光谱宽度
光学
激光束质量
光束直径
波长
梁(结构)
光谱包络
包络线(雷达)
质量(理念)
平方米
物理
力矩(物理)
均方根
光谱功率分布
窄带
材料科学
激光器
激光束
电信
计算机科学
雷达
经典力学
量子力学
作者
Yuqiao Xian,Yifneg Yang,Binglin Li,Meizhong Liu,Bing He,Jun Zhou
出处
期刊:Journal of Optics
[IOP Publishing]
日期:2022-08-09
卷期号:24 (9): 095601-095601
被引量:1
标识
DOI:10.1088/2040-8986/ac8494
摘要
Abstract We establish a model based on the dispersion of the diffractive grating to investigate the influence of the spectral envelope and wavelength stability on the combined beam quality M 2 of the spectral beam combining (SBC) system. We obtain the analytic expressions of combined beam quality corresponding to the second-moment-spectral width of the beamlets, which can be used to forecast the combined beam quality for any integrable spectral envelope shape of beamlets in an SBC system. Additionally, we find that the center wavelength shift of beamlets has a significant impact on the combined beam quality. The second-moment-based width of the center wavelength shift distribution among all beamlets should be less than 0.5 times the spectral width. Here, the spectral width is the weighted root mean square of all beamlets’ spectral width, where the weight is the power of each single channel.
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