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8 July 2019 Performance of a spectral beam combining grating with YAG substrate
Jiao Xu, Junming Chen, Peng Chen, Yonglu Wang, Yibin Zhang, Fanyu Kong, Hongchao Cao, Yunxia Jin, Jianda Shao
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Proceedings Volume 11064, Tenth International Conference on Thin Film Physics and Applications (TFPA 2019); 1106409 (2019) https://doi.org/10.1117/12.2540286
Event: Pacific Rim Laser Damage 2019 and Thin Film Physics and Applications 2019, 2019, Qingdao, China
Abstract
In a previous study, the temperature-rise of a spectral beam combining grating was analyzed theoretically and experimentally. It was concluded that the temperature of a grating can be effectively reduced by increasing the substrate thickness or by using a substrate material with higher thermal conductivity. In this study, yttrium aluminum garnet (YAG) was used as the substrate material to fabricate a spectral beam combining grating. The temperature, distortion, and far-field beam quality of the YAG-substrate-grating were analyzed theoretically and experimentally. It is concluded that, compared with the traditional quartz-substrate-grating, not only can the YAG-substrate-MDG withstand higher power, but the beam quality of the diffraction laser is also better.
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Jiao Xu, Junming Chen, Peng Chen, Yonglu Wang, Yibin Zhang, Fanyu Kong, Hongchao Cao, Yunxia Jin, and Jianda Shao "Performance of a spectral beam combining grating with YAG substrate", Proc. SPIE 11064, Tenth International Conference on Thin Film Physics and Applications (TFPA 2019), 1106409 (8 July 2019); https://doi.org/10.1117/12.2540286
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KEYWORDS
Distortion
Diffraction
Quartz
Diffraction gratings
High power lasers
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