Effect of partial coherence on four-wave mixing in photorefractive materials via reflection grating approximation

Citation
J. Zhao et al., Effect of partial coherence on four-wave mixing in photorefractive materials via reflection grating approximation, APP PHYS B, 72(3), 2001, pp. 317-322
Citations number
25
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
APPLIED PHYSICS B-LASERS AND OPTICS
ISSN journal
0946-2171 → ACNP
Volume
72
Issue
3
Year of publication
2001
Pages
317 - 322
Database
ISI
SICI code
0946-2171(200102)72:3<317:EOPCOF>2.0.ZU;2-H
Abstract
We investigate the effect of beam coherence on four-wave mixing via reflect ion gratings in photorefractive media. For the case of phase conjugation, t he results of our theoretical analysis indicate that partial coherence alwa ys leads to a drop of signal gain and phase conjugate reflectivity in non-d epleted cases. In general, the mutual coherence of the signal beam and the pump beam can be enhanced due to the process of wave mixing. The mutual coh erence of the phase conjugate beam and one of the pump beams depends on the beam intensity ratio as well as the optical path difference. This is disti nctly different from the four-wave mixing case with a transmission grating.