High-resolution 133Cs 6S-6D, 6S-8S two-photon spectroscopy using an intracavity scheme

You Huan Chen, Tze Wei Liu, Chien Ming Wu, Chien Chung Lee, Chao Kuei Lee, Wang Yau Cheng

Research output: Contribution to journalArticlepeer-review

14 Scopus citations


This Letter presents an intracavity scheme for diode laser based two-photon spectroscopy. To demonstrate generality, three 133Cs hyperfine transition groups of different wavelengths are shown. For the 6S-6D transitions, we achieved a 102 times better signal-to-noise ratio than in previous work [J. Phys. Soc. Jpn. 74, 2487 (2005)] with 10-3 times less laser power, revealingsome previously vague and unobserved spectra. Possible mutual influences between the two-photon absorber and laser cavity were investigated for the first time to our knowledge, which leads to the application of a reliable hand-sized optical frequency reference. Our approach is applicable for most of the two-photon spectroscopy of alkali atoms.

Original languageEnglish
Pages (from-to)76-78
Number of pages3
JournalOptics Letters
Issue number1
StatePublished - 1 Jan 2011


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