title: Instability of single-frequency operation in semilinear photorefractive coherent oscillators.
abstract: The transition of the single-frequency oscillation of a semilinear photorefractive coherent oscillator for sufficiently large coupling strengths into two-frequency oscillation is predicted and is observed experimentally. The critical value of the coupling strength at which the bifurcation occurs is a function of pump intensity ratio and cavity losses. The supercritical bifurcation in the oscillation spectrum is analogous to the second-order phase transition.
authors.affiliation: Laboratoire de Physique, Université de Bourgogne, 21078 Dijon, France.
authors.forename: P
authors.initials: P
authors.lastname: Mathey
authors.forename: S
authors.initials: S
authors.lastname: Odoulov
authors.forename: D
authors.initials: D
authors.lastname: Rytz