Theoretical analysis and experimental research of LD array beam shaping for end-pumped 1064nm Q-switched laser

Caili Wang; Shi-yong Xie; Yu Shi; Hua Cai; Jiao Lian; Tie-zhu Bo; Chang Liu; Jing Ma; Shuai-qi Li

doi:10.1117/12.2666626

12 April 2023 Theoretical analysis and experimental research of LD array beam shaping for end-pumped 1064nm Q-switched laser

Caili Wang, Shi-yong Xie, Yu Shi, Hua Cai, Jiao Lian, Tie-zhu Bo, Chang Liu, Jing Ma, Shuai-qi Li

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Proceedings Volume 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022); 1256542 (2023) https://doi.org/10.1117/12.2666626
Event: Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 2022, Shanghai, China

Abstract

High energy 1064 nm Q-switched laser output is obtained by LD vertical array end pumping Nd:YAG. For different divergence angles of fast axis and slow axis of LD array, aspheric lens and the glass rod is used for beam shaping of LD array. The results show that light intensity distribution of output laser is very sensitive to the structure of the beam shaping system, which can be controlled by adjusting the spatial position of pumping, such as the distance between the aspheric lens and the face of the glass rod, and the approximate Gaussian beam was obtained without damage. When the distance between the aspheric lens pair and the face of the glass rod is 16mm, a 1064 nm Q-switched laser with single pulse energy of 60.4 mJ under the pump energy of 489 mJ, corresponding to optical conversion efficiency of 12.4%.

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Caili Wang, Shi-yong Xie, Yu Shi, Hua Cai, Jiao Lian, Tie-zhu Bo, Chang Liu, Jing Ma, and Shuai-qi Li "Theoretical analysis and experimental research of LD array beam shaping for end-pumped 1064nm Q-switched laser", Proc. SPIE 12565, Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022), 1256542 (12 April 2023); https://doi.org/10.1117/12.2666626

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KEYWORDS

Glasses

Aspheric lenses

Beam shaping

Q switched lasers

Pulsed laser operation

Analytical research

Nd:YAG lasers

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