title: Strong lowering of the mirrorless optical oscillation threshold by angular mismatches for nonlocal photorefractive nonlinearity.
abstract: We show that the introduction of an angular mismatch for the pump waves results, in the case of nonlocal photorefractive nonlinearity, in a strong almost twofold decrease of the threshold value of the coupling strength for the mirrorless optical oscillation. This surprising feature will lead to a strong modification of the threshold and near-threshold behavior of a vast variety of optical oscillators based on the photorefractive phase conjugation and involving finite-size light beams.
authors.affiliation: Institut Carnot de Bourgogne, UMR 5209 CNRS, Université de Bourgogne, 9 Avenue Alain Savary, B.P. 47870, 21078 Dijon Cedex, France.
authors.forename: Riadh
authors.initials: R
authors.lastname: Rebhi
authors.forename: Pierre
authors.initials: P
authors.lastname: Mathey
authors.forename: Hans-Rudolf
authors.initials: HR
authors.lastname: Jauslin
authors.forename: Boris
authors.initials: B
authors.lastname: Sturman