Adaptive correlation filter for stabilization of interference-fiber-optic sensors

Abstract

A type of adaptive correlation filter for processing the speckle pattern emerging from an interference fiber-optic sensor is proposed. This filter is simple and self-adjustable, operating on the base of the photorefractive fanning effect. Experiments carried out with a Bi12TiO20 crystal and multimode optical fiber demonstrate high sensitivity and long-term stability of the sensor. © 1998 American Institute of Physics.