Theoretical study of beam quality degradation caused by grating dispersion in a spectral beam combining system

Yuqiao Xian; Hanbin Wang; Zhijun Yuan; Yifeng Yang; Yang You; Wenjie Wu; Bing He; Jun Zhou

doi:10.1117/12.2586596

12 March 2021 Theoretical study of beam quality degradation caused by grating dispersion in a spectral beam combining system

Yuqiao Xian, Hanbin Wang, Zhijun Yuan, Yifeng Yang, Yang You, Wenjie Wu, Bing He, Jun Zhou

Author Affiliations +

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 117633J (2021) https://doi.org/10.1117/12.2586596
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

In this paper, we investigated the association between beam quality and beam characteristic in theory in a spectral beam combining system and built a model to describe the dispersion. We analyzed that how the beam quality varies with different input beam parameters such as the waist radius 𝑤𝑤0 and the spectral width Δλ. There is a surprising result that the increased w₀ and Δλ have a coefficient influence on the beam quality degradation, and the degradation is pretty sensitive to the increase of waist radius w₀. The result gives us a guidance that besides using the narrow linewidth laser, we also need reduce the waist radius of the input beam in the SBC system appropriately to abate the beam quality degradation caused by dispersion.

Citation Download Citation

Yuqiao Xian, Hanbin Wang, Zhijun Yuan, Yifeng Yang, Yang You, Wenjie Wu, Bing He, and Jun Zhou "Theoretical study of beam quality degradation caused by grating dispersion in a spectral beam combining system", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 117633J (12 March 2021); https://doi.org/10.1117/12.2586596

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