Anomalous photorefractive response in two-beam coupling with focused beams in photorefractive crystals and waveguides
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), 550-558. (doi:10.1016/0030-4018(94)00573-D).
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Description/Abstract
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.
| Item Type: | Article |
|---|---|
| Additional Information: | |
| ISSNs: | 0030-4018 (print) |
| Related URLs: | |
| Subjects: | Q Science > QC Physics T Technology > TK Electrical engineering. Electronics Nuclear engineering |
| Divisions: | University Structure - Pre August 2011 > Optoelectronics Research Centre |
| Item ID: | 78422 |
| Date Deposited: | 11 Mar 2010 |
| Last Modified: | 02 Mar 2012 11:23 |
| Contributors: | Kaczmarek, M. (Author) Eason, R.W. (Author) |
| Date: | 1995 |
| Additional Information: | |
| Status: | Published |
| URI: | http://eprints.soton.ac.uk/id/eprint/78422 |
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