Analysis of Interaction Between Thermal Effect and Pump Optical Field Distribution in High Power Solid-State Laser

Pengfei, 屈鹏飞 Qu; Shiyu, 王石语 Wang; Zhen, 过振 Guo; Defang, 蔡德芳 Cai; Bingbin, 李兵斌 Li

doi:10.3788/aos201434.1114002

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2020

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“…Only a part of the energy is used in laser amplification, and most of the energy is absorbed by the medium, generating excessive heat. This will not only cause the phenomenon of thermal lensing [1,2] with the beam quality affected, but can also cause the gain medium to rupture and be damaged.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations on Wavefront Distortion of LD-Pumped Neodymium-Doped Silica-Glass Rod with High Thermal Shock Parameter

et al. 2020

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The characterization of a laser diode (LD)-pumped neodymium-doped silica glass (NDSG) laser is here described. The gain performance and wavefront distortion were measured, and the thermal toughness and uniformity distribution of the material were experimentally observed. At a pumping frequency of 1 Hz and energy 7.79 J, a small-signal gain of 1.16 was measured, and the wavefront distortion reached 2.67 λ (wavelength λ = 1053 nm). At a pumping frequency of 25 Hz with 194 W power, the NDSG was still not cracked, which is consistent with its high thermal shock parameter. However, the material uniformity was relatively poor. These results indicate good prospects for the application of NDSG lasers at high energy and high repetition frequency, but the gain performance, uniformity, and other aspects affected by the manufacturing process need to be improved.

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Section: Introductionmentioning

confidence: 99%