Method of single-fiber multimode interferometer speckle signal processing

Yuri N. Kulchin; Oleg B. Vitrik; Oleg V. Kirichenko; Oleg T. Kamenev; Yuri S. Petrov; Oleg G. Maksayev

doi:10.1117/12.253456

8 October 1996 Method of single-fiber multimode interferometer speckle signal processing

Yuri N. Kulchin, Oleg B. Vitrik, Oleg V. Kirichenko, Oleg T. Kamenev, Yuri S. Petrov, Oleg G. Maksayev

Proceedings Volume 2823, Statistical and Stochastic Methods for Image Processing; (1996) https://doi.org/10.1117/12.253456
Event: SPIE's 1996 International Symposium on Optical Science, Engineering, and Instrumentation, 1996, Denver, CO, United States

Abstract

A method of correlation processing of speckle-signals formed by multimode interferometer is theoretically and experimentally investigated. The method permits to transform modulation of a speckle-pattern to optical or electrical signal, which linear depends on correlation coefficient of reference and current speckle patterns. The functional dependence of correlation coefficient from value of lengthening of interferometer is studied. The results allow to perform quantitative measurements of lengthening value. Mathematical algorithm enabling to define a sign of lengthening is developed. A correlated change of local areas of speckle-patterns formed by multimode fiber is discovered. It is developed an analog computing system which can perform the correlation measurements in real time in wide bandwidth. Optical and electrical circuits are made on standard components, that makes the method suitable, for example, for industrial use.

Citation Download Citation

Yuri N. Kulchin, Oleg B. Vitrik, Oleg V. Kirichenko, Oleg T. Kamenev, Yuri S. Petrov, and Oleg G. Maksayev "Method of single-fiber multimode interferometer speckle signal processing", Proc. SPIE 2823, Statistical and Stochastic Methods for Image Processing, (8 October 1996); https://doi.org/10.1117/12.253456

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