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Three nanosecond-equal interval sub-pulses Nd:YAG laser with multi-step active Q-switching [Early Posting]

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摘要

We demonstrate a three-nanosecond equidistant sub-pulse multi-step Q-switched Nd: YAG laser. In the time interval of 100ns-1000ns, three pulses with the same nanosecond interval and the same peak power are obtained at the pulse width of 24ns, 28ns and 36.6ns, respectively. The energy is 32.5mJ and the optical efficiency is 10.8%.The multi-step Q-switched method does not require to insert other optical elements into the traditional Q-switched laser, it is very suitable to obtain pulse group output with several nanosecond pulse intervals.

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MAO Jie,chao wang,xiang Hong,Yu Yong Ji. Three nanosecond-equal interval sub-pulses Nd:YAG laser with multi-step active Q-switching[J].Chinese Optics Letters,2021,19(7):07.