ENHANCEMENT OF THE SIGNAL-TO-BACKGROUND RATIO IN PHOTOREFRACTIVE 2-WAVE MIXING BY MUTUALLY INCOHERENT 2-BEAM COUPLING

被引：12

作者：

BREUGNOT, S ^{[1
]}

DOLFI, D ^{[1
]}

RAJBENBACH, H ^{[1
]}

HUIGNARD, JP ^{[1
]}

DEFOUR, M ^{[1
]}

机构：

[1] THOMSON TRT DEF,F-78283 GUYANCOURT,FRANCE

来源：

OPTICS LETTERS | 1994年 / 19卷 / 14期

关键词：

D O I：

10.1364/OL.19.001070

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present and experimentally demonstrate a new method for enhancing the signal-to-background ratio of two-wave mixing in photorefractive crystals. The method uses a mutually incoherent third beam to suppress the fanning in a dark ring-shaped region in which the amplified signal is located. A 20-fold improvement of the signal-to-background ratio is measured in BaTiO3 at lambda = 514 am. The extension of this principle to wide-field-of-view heterodyne detection is discussed.

引用

页码：1070 / 1072

页数：3

共 15 条

[1]

ADLER CL, 1991, OPT LETT, V16, P1147

[2] HETERODYNE-DETECTION OF WEAK OPTICAL WAVE-FRONTS BURIED IN A PHOTOREFRACTIVE FANNING NOISE [J].