Lasers, Fiber Optics, and Communications

Modeling of the performance of a cryogenic gas cooled Yb:YAG multislab amplifier with a longitudinal doping gradient concentration

[+] Author Affiliations
Kaibo Xiao, Min Li

China Academy of Engineering Physics, Research Center of Laser Fusion, Mianyang 621900, China

Shanghai Jiao Tong University, Collaborative Innovation Center of IFSA, Shanghai 200240, China

Graduate School of China Academy of Engineering Physics, Beijing 100088, China

Xiaodong Yuan, Mingzhong Li, Wanguo Zheng, Jiangang Zheng

China Academy of Engineering Physics, Research Center of Laser Fusion, Mianyang 621900, China

Shanghai Jiao Tong University, Collaborative Innovation Center of IFSA, Shanghai 200240, China

Xiongwei Yan, Xinying Jiang, Zhenguo Wang

China Academy of Engineering Physics, Research Center of Laser Fusion, Mianyang 621900, China

Opt. Eng. 55(4), 046109 (Apr 21, 2016). doi:10.1117/1.OE.55.4.046109
History: Received December 5, 2015; Accepted March 28, 2016
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Abstract.  A cryogenic helium gas cooled Yb:YAG multislab amplifier with a longitudinal doping gradient concentration was proposed for developing high energy, high average power laser systems. As a comparison, the performance of the gradient doped amplifier was investigated with other constant and stepped doped amplifiers in terms of energy storage capacity, heat deposition, and amplification, based on the theory of quasi-three-level laser ions, Monte Carlo, and ray-tracing approaches. Improved lasing characteristics with more homogenous distributions of gain and heat load and higher efficiency was achieved in the gradient doped multislab amplifier while lower gain medium volume was required. It is shown that at the optimum operating temperature of 200 K, the maximum output energy of 867.76 J in the gradient doped amplifier was obtained, corresponding to an optical-to-optical efficiency of 22.41%.

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© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Kaibo Xiao ; Xiaodong Yuan ; Xiongwei Yan ; Min Li ; Xinying Jiang, et al.
"Modeling of the performance of a cryogenic gas cooled Yb:YAG multislab amplifier with a longitudinal doping gradient concentration", Opt. Eng. 55(4), 046109 (Apr 21, 2016). ; http://dx.doi.org/10.1117/1.OE.55.4.046109


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