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Strong photorefractive response of Rh:doped BaTiO3 at red and infrared wavelengths

Kaczmarek, M., Ross, G.W. and Eason, R.W. (1995) Strong photorefractive response of Rh:doped BaTiO3 at red and infrared wavelengths At 12th UK National Quantum Electronics Conference (QE12), United Kingdom. 04 - 08 Sep 1995.

Record type: Conference or Workshop Item (Paper)

Abstract

BaTiO3 crystal is one of the most efficient photorefractive materials, showing strong beam coupling and phase conjugation effects. Its attractive properties are, however, normally limited to visible wavelengths. In order to improve its infrared response, a new type of BaTiO3 has been grown [1] with additional impurities, mainly rhodium. We have investigated this new Rh:BaTiO3 to characterise its response and optical parameters. Our first results show an enhanced absorption at red and infrared wavelengths [2] and high reflectivities in self-pumped phase conjugate configurations. Additionally, strong laser-induced effects have been observed [3].
The aim of the studies presented in this contribution was to provide information about photorefractive centres present in Rh:BaTiO3. Using dual-wavelength illumination we were able to investigate more thoroughly the laser-induced change in absorption. Laser-induced absorption and transparency was measured at both visible (514.5, 633 and 750 nm) and infrared (800 and 1060 nm) wavelengths. Further, we have successfully modelled the observed changes, using numerical simulation of photorefractive centres, and achieved a good agreement between theory and experiment.
The strong changes of absorption influence the beam-coupling processes and phase conjugation. We will present the results of extremely high two-beam coupling gain, namely bigger than 20,000, obtained in only a 3 mm thick crystal. We believe that this is the highest photorefractive gain ever reported. We will discuss this experimental data together with theoretical modelling

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Published date: 1995
Venue - Dates: 12th UK National Quantum Electronics Conference (QE12), United Kingdom, 1995-09-04 - 1995-09-08

Identifiers

Local EPrints ID: 77077
URI: http://eprints.soton.ac.uk/id/eprint/77077
PURE UUID: 54a1d563-4c00-4e63-b8cc-6c41f047c6ce
ORCID for R.W. Eason: ORCID iD orcid.org/0000-0001-9704-2204

Catalogue record

Date deposited: 11 Mar 2010
Last modified: 18 Jul 2017 23:34

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Contributors

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

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