Dynamics of feedback controlled photorefractive beam coupling - art. no. 053805

Citation
Ev. Podivilov et al., Dynamics of feedback controlled photorefractive beam coupling - art. no. 053805, PHYS REV A, 6305(5), 2001, pp. 3805
Citations number
19
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW A
ISSN journal
1050-2947 → ACNP
Volume
6305
Issue
5
Year of publication
2001
Database
ISI
SICI code
1050-2947(200105)6305:5<3805:DOFCPB>2.0.ZU;2-E
Abstract
We investigate theoretically and experimentally the operation of a nonlinea r system, feedback controlled photorefractive beam coupling. It is shown th at the feedback equations used earlier if (+/- pi /2 phase shift between th e diffracted and transmitted beam components) are satisfactory only during a relatively short initial stage of development. We have generalized these equations by taking into account the inertia inherent in any real feedback loop. The initial feedback equations ensure the permanent operation of the nonlinear system and lead to a variety of periodic and quasiperiodic regime s. We investigate the distinctive features of these regimes and transitions between them for moderately thick crystals. Good qualitative agreement bet ween theory and experimental data is obtained for LiNbO3 crystals.