High-resolution laser spectroscopy of ultracold ytterbium atoms using spin-forbidden electric quadrupole transition

S. Uetake, A. Yamaguchi, D. Hashimoto, Y. Takahashi

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We have successfully observed high-resolution spectra of spin-forbidden electric quadrupole transition (1 S 03 D 2) in ytterbium (174Yb) atoms. The differential light shifts between the 1 S 0 and the 3 D 2 states in a far-off resonant trap at 532 nm are also measured. For the spectroscopy, we developed simple, narrow-linewidth, and long-term frequency stabilized violet diode laser systems. Long-term drifts of the excitation laser (404 nm) is suppressed by locking the laser to a length stabilized optical cavity. The optical path length of the cavity is stabilized to another diode laser whose frequency is locked to a strong 1 S 01 P 1 transition (399 nm) of Yb. Both lasers are standard extended-cavity diode lasers (ECDLs) in the Littrow configuration. Since the linewidth of a violet ECDL (̃10 MHz) is broader than a typical value of a red or near infra-red ECDL (<1 MHz), we employ optical feedback from a narrow-band Fabry-Perot cavity to reduce the linewidth. The linewidth is expected to be <20 kHz for 1 ms averaging time, and the long-term frequency stability is estimated to be ̃200 kHz/h.

Original languageEnglish
Pages (from-to)409-414
Number of pages6
JournalApplied Physics B: Lasers and Optics
Volume93
Issue number2-3
DOIs
Publication statusPublished - Nov 1 2008
Externally publishedYes

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)
  • Physics and Astronomy(all)

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