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Proceedings Paper

Detecting small phase modulation using photorefractive reflection hologram
Author(s): Roman V. Romashko; Yuri N. Kulchin; Alexei A. Kamshilin
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Paper Abstract

Theoretical and experimental studying of the vectorial wave mixing in the photorefractive crystal in the reflection geometry without applying an external electric field is presented. We demonstrate that small phase modulation of the object wave is linearly transferred into the intensity modulation of the output beam without any auxiliary polarization element but just mixing light waves with different polarization states (e.g., elliptical and linear). Geometry in which anisotropic diffraction occurs was chosen. The linear phase demodulation occurs because the inherent π/2 phase difference between orthogonal components of elliptically polarized wave is transferred into the interference term of the transmitted object and diffracted reference waves.

Paper Details

Date Published: 20 January 2006
PDF: 6 pages
Proc. SPIE 6027, ICO20: Optical Information Processing, 602727 (20 January 2006); doi: 10.1117/12.668199
Show Author Affiliations
Roman V. Romashko, Far Eastern State Technical Univ. (Russia)
Yuri N. Kulchin, Far Eastern State Technical Univ. (Russia)
Alexei A. Kamshilin, Univ. of Kuopio (Finland)


Published in SPIE Proceedings Vol. 6027:
ICO20: Optical Information Processing

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