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 two high-finesse cavities reaches a linewidth of a few Hertz and a frequency stability below 10 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.
Cite
@article{arxiv.1811.10484,
title = {Phase transfer between three visible lasers for coherent population trapping},
author = {Mathieu Collombon and Gaetan Hagel and Cyril Chatou and Didier Guyomarch and Didier Ferrand and Marie Houssin and Caroline Champenois and Martina Knoop},
journal= {arXiv preprint arXiv:1811.10484},
year = {2019}
}