High Power Laser Science and Engineering, 2015, 3 (3): 03000001, Published Online: Jan. 7, 2016
Long-pulse, single-frequency 1064 nm laser and frequency doubling 
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all-solid-state all-solid-state frequency doubling frequency doubling MOPA construction MOPA construction single-frequency laser single-frequency laser
Abstract
An all-solid-state single-frequency 1064 nm laser with a 100 μs pulse width, 500 Hz repetition rate and 700 mJ single pulse energy is designed using seed injection and a three-stage master oscillator power amplifier (MOPA) construction. Using this as a basis, research on long-pulse laser frequency doubling is carried out. By designing and optimizing the lithium triborate (LBO) crystal, the theoretically calculated maximum conversion efficiency _max reaches 68% at M2=1, while _min is 33% at M2=3. Generation of 212 mJ pulses of green light with a repetition rate as high as 500 Hz is obtained from a fundamental energy of 700 mJ. The experimental conversion efficiency reaches 31% and the power stability is better than ±1%.
Xiafei Xu, Gang Xie, Yanhua Lu, Lei Zhang, Min Wan. Long-pulse, single-frequency 1064 nm laser and frequency doubling[J]. High Power Laser Science and Engineering, 2015, 3(3): 03000001.
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