Open AccessAnalysis of bistable steady characteristics and dynamic stability of linearly tapered nonlinear Bragg gratings
Author(s) -
Xin-Hong Jia,
Ziyan Wu,
Guang-Qiong Xia
Publication year - 2004
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.12.002945
Subject(s) - bistability , grating , optics , materials science , fiber bragg grating , optical bistability , nonlinear system , stability (learning theory) , nonlinear optics , optoelectronics , physics , laser , quantum mechanics , machine learning , computer science
Based on the nonlinearly coupled mode equations (NLCME), the bistable steady characteristics and dynamic stability of linearly tapered nonlinear Bragg grating (LT-NLBG) have been investigated in detail. The results show that, when the device is tuned near an edge of "photonic band gap" (PBG), in contrast with the free-tapered grating, the negative-tapered grating enhances the switching-on threshold, but increases the on-off switching ratio, enlarges the stable regime, and strengthens the stability significantly. On the other hand, the positive-tapered grating decreases the switching-on threshold, but lower the on-off switching ratio, and worsen the stability remarkably.