Experimental design of double-cladding planar waveguide laser amplifier

Juntao Wang; Xiaojun Wang; Tangjian Zhou; Hao Hu; Qingsong Gao

doi:10.1117/12.2065350

3 February 2015 Experimental design of double-cladding planar waveguide laser amplifier

Juntao Wang, Xiaojun Wang, Tangjian Zhou, Hao Hu, Qingsong Gao

Proceedings Volume 9255, XX International Symposium on High-Power Laser Systems and Applications 2014; 92550L (2015) https://doi.org/10.1117/12.2065350
Event: XX International Symposium on High Power Laser Systems and Applications, 2014, Chengdu, China

Abstract

An end-pumped laser amplifier with high efficiency and compactness was designed. The thermal stress of symmetrical single-cladding and double-cladding planar waveguide with Nd:YAG as its core were analyzed theoretically, and the maximum thermal load for each were also obtained according to the stress fracture limit. For different inner cladding thickness, the maximum pump power that could be absorbed was calculated. The laser medium was chosen to be a symmetrical double-cladding planar waveguide with Nd:YAG as its core, the dimensions of the gain area were 50mm×12mm×100μm, and the waveguide were 60mm×12mm×2mm. The single thickness of inner cladding YAG and the outer cladding sapphire were 250μm and 700μm respectively. The size of LDA pump light was 18.9mm and 10mm respectively in fast axis and slow axis. The seeder was coupled into the waveguide from one end, and the outer cladding were welded with two heat sink for heat transfer. By theoretical calculation, if the seeder into the waveguide is 0.1W, the outputting power of 1651W could be obtained when the pump power from the LD array was 3600W, with the optical-optical efficiency of 46%.

Citation Download Citation

Juntao Wang, Xiaojun Wang, Tangjian Zhou, Hao Hu, and Qingsong Gao "Experimental design of double-cladding planar waveguide laser amplifier", Proc. SPIE 9255, XX International Symposium on High-Power Laser Systems and Applications 2014, 92550L (3 February 2015); https://doi.org/10.1117/12.2065350

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KEYWORDS

Cladding

Planar waveguides

Waveguides

YAG lasers

Nd:YAG lasers

Laser amplifiers

Sapphire

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