Influence of the neodymium glass parameters on the amplified spontaneous emission in slab amplifier

Bingyan Wang; Junyong Zhang; Yanli Zhang; Li Wang; Jianqiang Zhu

doi:10.1117/12.2071248

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3 February 2015 Influence of the neodymium glass parameters on the amplified spontaneous emission in slab amplifier

Bingyan Wang, Junyong Zhang, Yanli Zhang, Li Wang, Jianqiang Zhu

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Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 92551P (2015) https://doi.org/10.1117/12.2071248
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China

Abstract

Amplified spontaneous emission (ASE) causes the decrease of the inverted population density and the nonuniformity of gain in slab amplifier for high power laser systems. In this paper, a three dimension model, based on the data in SG-II, in which the residual reflection in the cladding and the ASE process are taken into consideration, is built to analyze the space distribution and time evolution of small signal gain coefficient using Monte Carlo algorithm and ray tracing. This model has been verified by comparing with the experimental data. The traverse size of slab is 68.2cm×36.3cm, which is usually decided by the clear aperture and the manufacture. By means of the model, the impact of thickness, residual reflectivity and the stimulated cross section of neodymium glass to the ASE are analyzed in detail.

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Bingyan Wang, Junyong Zhang, Yanli Zhang, Li Wang, and Jianqiang Zhu "Influence of the neodymium glass parameters on the amplified spontaneous emission in slab amplifier", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92551P (3 February 2015); https://doi.org/10.1117/12.2071248

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