Transverse modulational instability of counterpropagating quasi-phase-matched beams in a quadratically nonlinear medium

P. M. Lushnikov, P. Lodahl, M. Saffman
1998 Optics Letters  
We f ind the threshold and the generation angle for transverse instability of quasi-phase-matched counterpropagating fundamental and second-harmonic beams in a bulk x ͑2͒ medium. Numerical estimates indicate that the instability should be observable with currently available materials.
doi:10.1364/ol.23.001650 pmid:18091872 fatcat:b7jokiuvhzh2pjnvzd6p3yqedi