Dichroic Two-Photon Rubidium Frequency Standard

C. Perrella, P. S. Light, J. D. Anstie, F. N. Baynes, R. T. White, A. N. Luiten

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


We demonstrate an optical frequency standard based on the 5S1/2→5D5/2 two-photon transition of rubidium. The transition is interrogated in a Doppler-free arrangement by two lasers at 780 and 776 nm, with the sum frequency of the two lasers locked to the two-photon transition. We measure the fractional frequency stability of the frequency standard to be 1.5×10-13 at 1 s, reaching 4.9×10-14 at approximately 100s, by comparison with an optical frequency comb. Performance limitations are presented and a clear pathway to an order-of-magnitude improvement is discussed. This platform has the potential to deliver a compact, robust standard for commercial and industrial applications.

Original languageEnglish
Article number054063
JournalPhysical Review Applied
Issue number5
Publication statusPublished - 27 Nov 2019


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