Thermal Analysis of High-Power,High-Duty-Cycle Laser Diode Array

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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Section: Introductionmentioning

confidence: 99%

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

Wang

Xie

Shi

et al. 2023

Conference on Infrared, Millimeter, Terahertz Waves and Applications (IMT2022)

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“…High-energy Q-switched lasers with low repetition frequency have been widely used in many fields, such as mass spectrometry, laser lidars and laser indication for the characteristics of high peak power and narrow pulse width [1][2][3][4][5] . All solid-state laserspumped by semiconductor laser diodes(DPL) have the advantages of small size, long lifetime, high efficiency and good beam quality, DPLhave become a research hotspot for obtaining high energy Q-switched lasers.Compared with side-pumped,LD end-pumped solid-state laser with high pump power has been widely investigated due to its advantages such as high efficiencyandgood mode matching, and so on.Meantime, the laser structure in end-pumped is more compact, which is conducive to reducing the volume and weight of the laser.…”

Section: Introductionmentioning

confidence: 99%