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

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書誌事項

公開日
2008-10-03
権利情報
  • http://www.springer.com/tdm
DOI
  • 10.1007/s00340-008-3225-x
公開者
Springer Science and Business Media LLC

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説明

We have successfully observed high-resolution spectra of spin-forbidden electric quadrupole transition (1 S 0→3 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 0→1 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.

収録刊行物

  • Applied Physics B

    Applied Physics B 93 (2-3), 409-414, 2008-10-03

    Springer Science and Business Media LLC

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