title: Low threshold optical oscillations in a whispering gallery mode CaF(2) resonator.
abstract: We have observed low-threshold optical hyperparametric oscillations in a high-Q fluorite whispering gallery mode resonator. The oscillations result from the resonantly enhanced four-wave mixing occurring due to Kerr nonlinearity of the material. We demonstrate that, because of the narrow bandwidth of the resonator modes as well as the high efficiency of the resonant frequency conversion, the oscillations produce stable narrow-band beat-note of the pump, signal, and idler waves. A theoretical model for this process is described.
authors.affiliation: Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, Pasadena, CA 91109-8099, USA.
authors.forename: Anatoliy A
authors.initials: AA
authors.lastname: Savchenkov
authors.forename: Andrey B
authors.initials: AB
authors.lastname: Matsko
authors.forename: Dmitry
authors.initials: D
authors.lastname: Strekalov
authors.forename: Makan
authors.initials: M
authors.lastname: Mohageg
authors.forename: Vladimir S
authors.initials: VS
authors.lastname: Ilchenko
authors.forename: Lute
authors.initials: L
authors.lastname: Maleki