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Anomalous photorefractive response in two-beam coupling with focused beams in photorefractive crystals and waveguides

Record type: Article

We report on anomalous two-beam coupling results observed in photorefractive BaTiO3 crystals and ion-implanted wave-guides when focussed beams have been used. The two-beam coupling gain, investigated as a function of the input beam ratio, showed an enhanced magnitude, when compared with the standard theory, and exhibited a strong beam ratio dependence. In order to explain the significant difference we observed between theory and experiment, we discuss several models, based on intensity-dependent processes, and show that only a modification with the enhanced photoinduced space-charge field being a nonlinear function of modulation, has given an agreement with the experimentally determined results.

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Citation

Kaczmarek, M. and Eason, R.W. (1995) Anomalous photorefractive response in two-beam coupling with focused beams in photorefractive crystals and waveguides Optics Communications, 113, (4-6), pp. 550-558. (doi:10.1016/0030-4018(94)00573-D).

More information

Published date: 1995

Identifiers

Local EPrints ID: 78422
URI: http://eprints.soton.ac.uk/id/eprint/78422
ISSN: 0030-4018
PURE UUID: 0d4c0259-4125-4053-ad3f-197faf1c6e8b
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

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Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:24

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Contributors

Author: M. Kaczmarek
Author: R.W. Eason ORCID iD

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