The effect of bulk light absorption on running photorefractive holograms

Citation
Kh. Ringhofer et al., The effect of bulk light absorption on running photorefractive holograms, J OPT A-P A, 2(1), 2000, pp. 34-38
Citations number
7
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science","Optics & Acoustics
Journal title
JOURNAL OF OPTICS A-PURE AND APPLIED OPTICS
ISSN journal
1464-4258 → ACNP
Volume
2
Issue
1
Year of publication
2000
Pages
34 - 38
Database
ISI
SICI code
1464-4258(200001)2:1<34:TEOBLA>2.0.ZU;2-9
Abstract
The influence of bulk light absorption on running photorefractive holograms is investigated. By solving the coupled wave equations we prove that the b eam intensities, but not the beam phases, can be calculated by averaging th e coupling constant over the crystal thickness. We show the importance of t he effect by calculating the dielectric relaxation time at the crystal fron t, and from that the quantum efficiency from a feedback-controlled experime nt with a 2.05 mm thick BTO crystal. We propose to simulate the effect of bulk light absorption by a rude estima te of the average dielectric relaxation time which is related in a simple w ay to the dielectric relaxation time at the crystal front, in doing so an e rror of less than 10% is introduced.