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Phase transfer between three visible lasers for coherent population trapping

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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https://hal.archives-ouvertes.fr/hal-01936063
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Submitted on : Tuesday, November 27, 2018 - 11:27:29 AM
Last modification on : Tuesday, October 19, 2021 - 10:49:23 PM
Long-term archiving on: : Thursday, February 28, 2019 - 1:52:15 PM

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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, Optical Society of America - OSA Publishing, 2019, 44 (4), pp.859-862. ⟨10.1364/OL.44.000859⟩. ⟨hal-01936063v1⟩

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