Togashi Tadashi, Kanai Teruto, Sekikawa Taro, Watanabe Shuntaro, Chen Chuangtian, Zhang Chengqian, Xu Zuyan, Wang Jiyang
Institute for Solid State Physics, University of Tokyo, 5-1-5 Kashiwanoha, Kashiwa-shi, Chiba 277-8581, Japan.
Opt Lett. 2003 Feb 15;28(4):254-6. doi: 10.1364/ol.28.000254.
We have demonstrated the second harmonic of a frequency-tripled Nd:YVO4 laser with 2.5-mW quasi-cw output by using an optically contacted, prism-coupled KBe2BO3F2 crystal. We also achieved the second harmonic with a frequency-doubled single-mode Ti:sapphire laser at 172.5 nm and sum-frequency mixing with a dual-wavelength Ti:sapphire laser at 163.3 nm. These wavelengths are to our knowledge the shortest obtained by use of nonlinear crystals for second-harmonic generation and sum-frequency mixing, respectively.
