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 fourth 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, Brewstercut 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 (TA) as a fundamental source, we demonstrated magneto-optical trapping of all stable Cd isotopes including isotopes 111Cd and 113Cd, which are applicable to optical lattice clocks.

Original languageEnglish (US)
Pages (from-to)705-708
Number of pages4
JournalOptics Letters
Volume41
Issue number4
DOIs
Publication statusPublished - Feb 15 2016

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Kaneda, Y., Yarborough, J. M., Merzlyak, Y., Yamaguchi, A., Hayashida, K., Ohmae, N., & Katori, H. (2016). Continuous-wave, single-frequency 229 nm laser source for laser cooling of cadmium atoms. Optics Letters, 41(4), 705-708. https://doi.org/10.1364/OL.41.000705