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arXiv · 1605.03655

Continuous-wave, single-frequency 229 nm laser source for laser cooling of cadmium atoms

Yushi Kaneda·J. M. Yarborough·Yevgeny Merzlyak·Atsushi Yamaguchi·Keitaro Hayashida·Noriaki Ohmae·Hidetoshi Katori
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Abstract

Continuous-wave output at 229 nm for the application of laser cooling of Cd atoms was generated by the 4th harmonic using two successive second harmonic generation stages. Employing a single-frequency optically pumped semiconductor laser as a fundamental source, 0.56 W of output at 229 nm was observed with a 10-mm long, Brewster-cut BBO crystal in an external cavity with 1.62 W of 458 nm input. Conversion efficiency from 458 nm to 229 nm was more than 34%. By applying a tapered amplifier as a fundamental source, we demonstrated magneto-optical trapping of all stable Cd isotopes including isotopes $^{111}$Cd and $^{113}$Cd, which are applicable to optical lattice clocks.

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Yushi Kaneda, J. M. Yarborough, Yevgeny Merzlyak, Atsushi Yamaguchi, Keitaro Hayashida, Noriaki Ohmae, Hidetoshi Katori. 2016-05-12. Continuous-wave, single-frequency 229 nm laser source for laser cooling of cadmium atoms. https://doi.org/10.1364/ol.41.000705

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