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.
© 2008 Optical Society of America
Original Manuscript: August 26, 2008
Revised Manuscript: October 2, 2008
Manuscript Accepted: October 22, 2008
Published: November 20, 2008
Riadh Rebhi, Pierre Mathey, Hans-Rudolf Jauslin, and Boris Sturman, "Strong lowering of the mirrorless optical oscillation threshold by angular mismatches for nonlocal photorefractive nonlinearity," Opt. Lett. 33, 2773-2775 (2008)