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27 March 2022 A novel design of multi-pass pumped Yb:YAG planar waveguide amplifier
Bo Qu, Sibo Wang, Zhanda Zhu, Yongling Hui, Hong Lei, Qiang Li
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Proceedings Volume 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications; 121699I (2022) https://doi.org/10.1117/12.2625222
Event: Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 2021, Kunming, China
Abstract
We present a novel structure of planar waveguide for Yb:YAG laser amplifiers allowing large absorption length. The structure parameters of the planar waveguide were optimized using an 3D amplification model. The performance of the optimized planar waveguide laser amplifier was simulated, and a comparison between the cases with and without considering pump saturation was carried out. The simulated results show that a high pump absorption efficiency and optical-to-optical efficiency can be expected in addition to a good absorption uniformity. The seeder power is scaled from 200W to 7000W, the corresponding pump absorption and optical-to-optical efficiencies are 98.6% and 68%, respectively. The thermal stress of the designed planar waveguide was analyzed theoretically, showing that the pump power of 10kW is available according to the stress fracture limit.
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Bo Qu, Sibo Wang, Zhanda Zhu, Yongling Hui, Hong Lei, and Qiang Li "A novel design of multi-pass pumped Yb:YAG planar waveguide amplifier", Proc. SPIE 12169, Eighth Symposium on Novel Photoelectronic Detection Technology and Applications, 121699I (27 March 2022); https://doi.org/10.1117/12.2625222
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KEYWORDS
Planar waveguides
YAG lasers
3D modeling
Ytterbium
Laser amplifiers
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