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Journal Articles Optics Letters Year : 2019

Phase transfer between three visible lasers for coherent population trapping

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Abstract

Stringent conditions on the phase relation of multiple photons are a prerequisite for novel protocols of high-resolution coherent spectroscopy. In a recent experiment we have implemented an interrogation process of a Ca +-ion cloud based on three-photon coherent population trapping, with the potential to serve as a frequency reference in the THz-range. This high-resolution interrogation has been made possible by phase-locking both laser sources for cooling and repumping of the trapped ions to a clock laser at 729 nm by means of an optical frequency comb. The clock laser, a titanium-sapphire laser built in our lab locked onto its high-finesse cavities reaches a linewidth of a few Hertz and a frequency stability below 10 −14 at one second, performances which can be copied onto the two other sources. In this paper we discuss the performances of the phase-transfer between the three involved lasers via the optical frequency comb.
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Dates and versions

hal-01936063 , version 1 (27-11-2018)
hal-01936063 , version 2 (05-02-2019)

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Mathieu Collombon, Gaetan Hagel, Cyril Chatou, Didier Guyomarc'H, Didier Ferrand, et al.. Phase transfer between three visible lasers for coherent population trapping. Optics Letters, 2019, 44 (4), pp.859-862. ⟨10.1364/OL.44.000859⟩. ⟨hal-01936063v1⟩
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