A design of a surface-doped Yb:YAG slab laser with high power and high efficiency

• DOI: 10.3788/col201816.101401
• Publication Date: 2018-10-12T05:07:15Z
• Authors: Jiao Liu Jiao Liu; Yang Liu Yang Liu; Xiaojun Tang Xiao...; Chao Wang Chao Wang; Lei Liu Lei Liu; Lu Chen Lu Chen; Ning Li Ning Li; Ke Wang Ke Wang; Xingbo Liang Xing...; Kunpeng Lü Kunpen...; Xue Yang Xue Yang; Hong Zhao Hong Zhao; Nianjiang Chen Ni...
• Keywords: 0211 other engineering and technologies; 02 engineering and technology; 7. Clean energy

We demonstrate a high-efficiency and high-power quasi-three-level laser based on a trapezoidal composite slab architecture with a 270 μm-thick Yb-doping surface. The design of a surface-doped slab architecture, temperature effects, laser oscillator model, and laser oscillator experiments with a surface-doped slab as a laser host medium have been presented. By theoretical calculation, the temperature rise in the surface-doped slab is only one seventh of that in the bulk-doped slab at the same maximum pump power of 30 kW. Finally, in the laser oscillator experiments, an output energy of 21.6 J is obtained when the pump energy is 48 J with a repetition rate of 5 Hz and a pulse width of 1 ms. The optical-optical efficiency is 45%.