Exact cascading nonlinearity in quasi-phase-matched quadratic media

被引：8
|
作者：
Conforti, Matteo [1 ,2 ]
机构：
[1] Univ Lille 1, CNRS, UMR USR 8523 3380, PhLAM IRCICA, F-59655 Villeneuve Dascq, France
[2] Univ Brescia, Dipartimento Ingn Informaz, I-25123 Brescia, Italy
来源：
OPTICS LETTERS | 2014年 / 39卷 / 08期
关键词：
FEMTOSECOND PULSES; SPATIAL SOLITONS; COMPRESSION; SHIFT; GENERATION;
D O I：
10.1364/OL.39.002427
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The evolution of light pulses and beams in a quasi-phase-matched (QPM) quadratic medium is usually described by considering only the spatial harmonic of the QPM grating that minimizes the residual phase-mismatch. I show that, for strongly phase-mismatched interactions (the cascading regime), several harmonics need to be accounted for in order to obtain the correct value of the effective cubic nonlinearity, for which I find a simple analytical expression. I discuss the effects of the higher order harmonics of the grating on solitary wave propagation. (C) 2014 Optical Society of America
引用
收藏
页码：2427 / 2430
页数：4
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