Open AccessCOHERENT LIGHT AMPLIFICATION IN PHOTOREFRACTIVE CRYSTALS WITH A LOCAL RESPONSE
Author(s) -
Ren Guo,
Simin Liu,
Ling Zhen-Fang,
Guangyin Zhang
Publication year - 1997
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.46.1681
Subject(s) - photorefractive effect , signal beam , optics , bragg's law , reflection (computer programming) , beam (structure) , light beam , physics , grating , diffraction , signal (programming language) , phase conjugation , phase (matter) , materials science , laser , quantum mechanics , computer science , programming language
It is shown theoretically and experimentally that a weak signal light amplification is possible in thin photorefractive crystals with a local nonlinear response due to photovoltaic charge transport.The origin of the power exchange is that four wave interaction of the input beams and reflection beam at the rear will form two sets of bending gratings with certain spatial phase shift.When the grating written by the reflection wave and its diffracted wave is read by the input pump beam under off Bragg condition ,the weak signal beam achieves coherent amplification.Theoretical and experimental results are compared with each other.