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Proceedings Paper

Determination of the electro-optic coefficient of Bi12TiO20 photorefractive crystals using the laser light self-diffraction
Author(s): Mariana Petris; Valentin I. Vlad; Ileana Apostol
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Paper Abstract

In this paper, we report an all-optical method for the determination of the electro-optic coefficient of the photorefractive crystals. Two laser beams with the wavelength (lambda) equals 632.8 nm interfere in a Bi12TiO20 (BTO) crystal, inducing a phase grating on which they are self-diffracting. The photoinduced space-charge field is anharmonic as a consequence of the high contrast of the incident light fringe pattern imposed by the condition of large diffraction efficiency. Our analytical evaluation of the light intensity in the diffraction orders (in the Raman-Nath regime) and processing of the experimental results led to the determination of the electro-optic coefficient, r. The values of the electro-optic coefficient, obtained for different BTO crystal samples, are in agreement with those reported in literature and obtained by electro-optical methods.

Paper Details

Date Published: 8 March 1995
PDF: 5 pages
Proc. SPIE 2461, ROMOPTO '94: Fourth Conference in Optics, (8 March 1995); doi: 10.1117/12.203555
Show Author Affiliations
Mariana Petris, Institute of Atomic Physics (Romania)
Valentin I. Vlad, Institute of Atomic Physics (Romania)
Ileana Apostol, Institute of Atomic Physics (Romania)


Published in SPIE Proceedings Vol. 2461:
ROMOPTO '94: Fourth Conference in Optics

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