| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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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
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| Cite this article: |
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ZOU Hong-Xin, WU Yue, CHEN Guo-Zhu et al 2015 Chin. Phys. Lett. 32 054207 |
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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.
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Received: 01 February 2015
Published: 01 June 2015
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| PACS: |
42.72.Bj
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(Visible and ultraviolet sources)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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32.30.Jc
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(Visible and ultraviolet spectra)
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