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PCSEL pumped coupling optics free Yb:YAG/Cr:YAG microchip laser

Xiaoyang Guo, Shigeki Tokita, Kazuyoshi Hirose, Takahiro Sugiyama, Akiyoshi Watanabe, Kenji Ishizaki, Susumu Noda, Noriaki Miyanaga, and Junji Kawanaka

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Abstract

The passively Q-switched operation of a cryogenically cooled Yb:YAG/Cr:YAG microchip laser was demonstrated with end pumping by a photonic crystal surface emitting laser (PCSEL). This laser generated 70 μJ/1.7 ns/3.2 kHz pulses with near diffraction limited beam quality (M2=1.1) at 1029.4 nm. There were no coupling optics between the microchip laser crystal and PCSEL, which made the system simple and compact.

© 2018 Optical Society of America

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