Article,

Erbium fiber laser-based direct frequency comb spectroscopy of Rb two-photon transitions

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Opt. Lett., 38 (23): 5028--5031 (December 2013)
DOI: 10.1364/OL.38.005028

Abstract

We demonstrate the direct frequency comb spectroscopy of Rb 5S&\#x2192;5D two-photon transitions directly excited by an optical frequency comb (OFC) in 1.5&\#xA0;&\#x3BC;m fiber communication bands. A chain of comb spectral manipulation and quantum coherence control is implemented to enhance the efficiency of second harmonic OFC generation and eliminate the Doppler-broadening background. The direct frequency comb spectroscopy with clearly resolved transition lines is obtained. Our scheme provides a potential approach to realize the OFC at &\#x223C;1.5&\#x2009;&\#x2009;&\#x3BC;m with high stability and accuracy.

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