Journal
OPTICS EXPRESS
Volume 27, Issue 26, Pages 38134-38146Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.27.038134
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We demonstrated the power scaling of a passively Q-switched Pr3+ :LiYF4 (YLF) laser at 523, 607, and 640 nm with a Co2+ :MgAl2O4 (MALO) saturable absorber and analyzed the experimental results with a numerical simulation based on rate equations. A maximum pulse energy of 33.5 mu J was obtained with a pulse width of 30.9 ns and a repetition rate of 64.0 kHz at 640 nm. We demonstrated ultraviolet pulse generation at 261 and 320 nm by intracavity frequency doubling and obtained 63.3-ns pulses with a pulse energy of 7.0 mu J and a repetition rate of 64.6 kHz at 320 nm as well as 356-ns 261-nm pulses with a pulse energy of 0.2 mu J at a repetition rate of 82.0 kHz. To the best of our knowledge, a 261-nm pulse is the shortest wavelength laser directly generated from the intracavity second-harmonic generation of passively Q-switched lasers. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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