Multichannel adaptive fiber optical system for monitoring of fast processes in solid state

Yuri N. Kulchin; Roman V. Romashko; Eugene N. Piskunov

doi:10.1117/12.435894

8 August 2001 Multichannel adaptive fiber optical system for monitoring of fast processes in solid state

Yuri N. Kulchin, Roman V. Romashko, Eugene N. Piskunov

Proceedings Volume 4513, Optoelectronic Information Systems and Processing; (2001) https://doi.org/10.1117/12.435894
Event: Optoelectronic Information Systems and Processing, 2000, Vladivostok, Russian Federation

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.

Citation Download Citation

Yuri N. Kulchin, Roman V. Romashko, and Eugene N. Piskunov "Multichannel adaptive fiber optical system for monitoring of fast processes in solid state", Proc. SPIE 4513, Optoelectronic Information Systems and Processing, (8 August 2001); https://doi.org/10.1117/12.435894

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