FIBRE AND INTEGRATED OPTICS. OPTICAL PROCESSING OF INFORMATION

Mechanism of lock-in detection with the aid of an alternating field perpendicular to the surface of a planar photorefractive waveguide

B. Ya. Zel'dovich, Yu. V. Miklyaev, V. I. Safonov

Chelyabinsk State Technical University

Abstract: An analysis is made of the mechanism of formation of a stationary grating in a planar photorefractive waveguide by a travelling interference pattern with the aid of an alternating electric field applied perpendicular to the waveguide layer. A theoretical calculation is reported of the distribution of the space-charge field in a transverse section of the waveguide. Finite drift lengths and trap saturation are taken into account in these calculations, which are carried out on the assumption of a weak contrast in the interference pattern.

PACS: 42.40.Eq, 42.65.Hw, 42.79.Gn

Received: 31.12.1995

 English version: Quantum Electronics, 1995, 25:2, 167–171

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