title: Mode-coupling control in resonant devices: Application to solid-state ring lasers.
abstract: We report the theoretical and experimental investigation of the effects of mode coupling in a resonant macroscopic quantum device, in the case of a solid-state ring laser. This is achieved by introducing an additional coupling source whose interplay with the already-existing nonlinear effects ensures the coexistence of two counterpropagating cavity modes yielding a rotation-sensitive beat note. The determination of the condition for rotation sensing, both theoretically and experimentally, allows a quantitative study of the role of various mode-coupling mechanisms, in particular, the gain-induced mode coupling. We point out the connection between our work and the theoretical work on mode coupling in superfluid devices. This work opens up the possibility of new types of active rotation sensors.
authors.affiliation: Thales Research and Technology France, RD 128, 91767 Palaiseau Cedex, France. sylvain.schwartz@thalesgroup.com
authors.forename: Sylvain
authors.initials: S
authors.lastname: Schwartz
authors.forename: Gilles
authors.initials: G
authors.lastname: Feugnet
authors.forename: Philippe
authors.initials: P
authors.lastname: Bouyer
authors.forename: Evguenii
authors.initials: E
authors.lastname: Lariontsev
authors.forename: Alain
authors.initials: A
authors.lastname: Aspect
authors.forename: Jean-Paul
authors.initials: JP
authors.lastname: Pocholle