Generation of Continuous-Wave 194 nm Laser for Mercury Ion Optical Frequency Standard
ZOU Hong-Xin** , WU Yue, CHEN Guo-Zhu, SHEN Yong, LIU Qu
Department of Physics, The National University of Defense Technology, Changsha 410073
Abstract ：A 194-nm cw laser is an essential part in the mercury ion optical frequency standard. We report the generation of over 2 mW continuous-wave radiation at 194 nm in a beta barium borate crystal using a simple sum frequency mixing (SFM) system. One source beams at 718 nm is resonantly enhanced with a cavity and the other at 266 nm makes a single pass. Considering the walk-off effect in SFM, the source beam waists are designed to be elliptical, thus the conversion efficiency can be promoted. The 266-nm beam produced by frequency doubling of 532-nm laser is shaped close to the diffraction limit to achieve better mode matching.
收稿日期: 2015-02-01
出版日期: 2015-06-01
:
42.72.Bj
(Visible and ultraviolet sources)
42.65.Ky
(Frequency conversion; harmonic generation, including higher-order harmonic generation)
32.30.Jc
(Visible and ultraviolet spectra)
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2015, Vol. 32 
