Detecting small phase modulation using photorefractive reflection hologram

Roman V. Romashko; Yuri N. Kulchin; Alexei A. Kamshilin

doi:10.1117/12.668199

20 January 2006 Detecting small phase modulation using photorefractive reflection hologram

Roman V. Romashko, Yuri N. Kulchin, Alexei A. Kamshilin

Proceedings Volume 6027, ICO20: Optical Information Processing; 602727 (2006) https://doi.org/10.1117/12.668199
Event: ICO20:Optical Devices and Instruments, 2005, Changchun, China

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.

Citation Download Citation

Roman V. Romashko, Yuri N. Kulchin, and Alexei A. Kamshilin "Detecting small phase modulation using photorefractive reflection hologram", Proc. SPIE 6027, ICO20: Optical Information Processing, 602727 (20 January 2006); https://doi.org/10.1117/12.668199

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