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Fiber coupled 1 kW repetitively acousto-optic Q-switched cw-pumped Nd:YAG rod laser

2019-05-30

Authors: Wang, YB; Zhang, ZY; Liang, H; Qu, SC; Gao, JC; Lin, XC
OPTICS AND LASER TECHNOLOGY
Volume: 116 Pages: 139-143 Published: AUG 2019 Language: English Document type: Article
DOI: 10.1016/j.optlastec.2019.03.021
Abstract:
With MOPA configurations, a fiber coupled 1 kW repetitively acousto-optic Q-switched cw-pumped Nd:YAG rod laser is studied in detail. Low-order aberrations introduced by MOPA systems add difficulties to high efficiency of optical fiber coupling. With 300 pm 0.22 NA fiber coupled, an average power of 1022 W along with 102 ns pulse width at 20 kHz is obtained with 11.6% electro-to-optical efficiency and 93% fiber coupling efficiency, and the corresponding peak power is about 500 kW. The power stability is better than 0.93% at the maximum output power in an hour.
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