We show that, in the high wave-vector-mismatch (cascading) limit, the well-known paraxial description of parametric frequency conversion in quadratic media entails effective lensing effects, which can have a self-focusing or a self-defocusing nature, critically depending on the mismatch sign, the selected wave, and the launching condition (second-harmonic generation or downconversion). Numerical and experimental evidence of this behavior is reported. (C) 2002 Optical Society of America.
Effective lensing effects in parametric frequency conversion / Conti, Claudio; S., Trillo; P., Di Trapani; J., Kilius; A., Bramati; S., Minardi; W., Chinaglia; G., Valiulis. - In: JOURNAL OF THE OPTICAL SOCIETY OF AMERICA. B, OPTICAL PHYSICS. - ISSN 0740-3224. - STAMPA. - 19:4(2002), pp. 852-859. (Intervento presentato al convegno 8th OSA Topical Meeting on Nonlinear Guided Waves and Their Application (NLGW) tenutosi a CLEARWATER, FL nel MAR, 2001) [10.1364/josab.19.000852].
Effective lensing effects in parametric frequency conversion
CONTI, CLAUDIO;
2002
Abstract
We show that, in the high wave-vector-mismatch (cascading) limit, the well-known paraxial description of parametric frequency conversion in quadratic media entails effective lensing effects, which can have a self-focusing or a self-defocusing nature, critically depending on the mismatch sign, the selected wave, and the launching condition (second-harmonic generation or downconversion). Numerical and experimental evidence of this behavior is reported. (C) 2002 Optical Society of America.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
