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Proceedings Paper

Multichannel adaptive fiber optical system for monitoring of fast processes in solid state
Author(s): Yuri N. Kulchin; Roman V. Romashko; Eugene N. Piskunov
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Paper Abstract

A measuring system for long-term registration of fast processes in solid state objects under mechanical stresses based on using several single-fiber multimode interferometers (SFMMI) as sensors is proposed. Multi-channel adaptive correlation filter based on photorefractive crystal is used for simultaneous processing speckle signals from SFMMI. Mutual influence of the neighboring channels in crystal is analyzed, and it is shown that the simultaneous processing of several channels can be performed by using a single photorefractive crystal, even if optical fields from different sources are overlapped inside crystal. Such important property of proposed filter as its adaptability allows to separate fast processes of crack generating from slow processes of stress accumulating inside deformed object.

Paper Details

Date Published: 8 August 2001
PDF: 6 pages
Proc. SPIE 4513, Optoelectronic Information Systems and Processing, (8 August 2001); doi: 10.1117/12.435894
Show Author Affiliations
Yuri N. Kulchin, Far Eastern State Technical Univ. (Russia)
Roman V. Romashko, Far Eastern State Technical Univ. (Russia)
Eugene N. Piskunov, Far Eastern State Technical Univ. (Russia)

Published in SPIE Proceedings Vol. 4513:
Optoelectronic Information Systems and Processing

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