We report an optical frequency standard based on the 5s --> 5d two-photon transition in Rb atoms. The frequency of a lambda = 778 nm diode laser was locked to the two-photon transition. Second-harmonic generation and an optical phase-locked loop were used to transfer the frequency stability to lambda = 1.556 mum for use in optical fiber communication applications.
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| http://dx.doi.org/10.1364/ol.22.000730 | DOI Listing |
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