LOW-NOISE PHOTOREFRACTIVE AMPLIFICATION AND DETECTION OF VERY WEAK SIGNAL BEAMS

Authors
BREUGNOT S RAJBENBACH H DEFOUR M HUIGNARD JP
Citation
S. Breugnot et al., LOW-NOISE PHOTOREFRACTIVE AMPLIFICATION AND DETECTION OF VERY WEAK SIGNAL BEAMS, Optics letters, 20(5), 1995, pp. 447-449
Citations number
11
Categorie Soggetti
Optics
Journal title
Optics letters → ACNP
ISSN journal
01469592
Volume
20
Issue
5
Year of publication
1995
Pages
447 - 449
Database
ISI
SICI code
0146-9592(1995)20:5<447:LPAADO>2.0.ZU;2-5
Abstract
We present theoretical and experimental analyses of the signal-to-nois e ratio (SNR) of photorefractive two-wave mixing detection that uses B aTiO3. The influence of beam fanning is taken into account in the dete ction process. Different known methods to enhance the SNR of the detec tion are theoretically and experimentally compared. A 10-fold improvem ent of the SNR is obtained, and the detection of a 1-pW signal intensi ty for a SNR of 50 is achieved for two of them.