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

Research output: Contribution to journalArticlepeer-review

30 Scopus citations


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
Issue number4
StatePublished - Feb 15 2016

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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