Electronic speckle-interferometry method for processing of multimode interferometry sensor output signal

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

doi:10.1117/12.226704

10 November 1995 Electronic speckle-interferometry method for processing of multimode interferometry sensor output signal

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

Author Affiliations +

Proceedings Volume 2647, International Conference on Holography and Correlation Optics; (1995) https://doi.org/10.1117/12.226704
Event: International Conference on Holography and Correlation Optics, 1995, Chernivsti, Ukraine

Abstract

Single fiber multimode interferometers (SMI) have good prospects for the physical field parameters registrations. SMI advantages are the height stability of its performances, easy fitness with light sources, and the great simplicity of its optical scheme. External influence on the fiber causes the changes of light spatial distribution in the intermode interference speckle pattern. However speckle position shifts are not directly related to the external influence value. So it is difficult to apply the methods of garantitative interferometry measuring which had developed for non-single-fiber optic interferometers. It is necessary to use complex spatial filtering methods. The spatial filter of intensity correlation (SFIC) is an effective element for SMI output signal processing. But temperature changes of fiber performances limit the band of real SFIC application. Electronics analogy of dynamic SFIC can show the very good results for SMI data processing. So the main purpose of this paper is development of the electronic speckle-interferometry method.

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Oleg B. Vitrik, Yuri N. Kulchin, Oleg G. Maxaev, Oleg V. Kirichenko, Oleg T. Kamenev, and Yuri S. Petrov "Electronic speckle-interferometry method for processing of multimode interferometry sensor output signal", Proc. SPIE 2647, International Conference on Holography and Correlation Optics, (10 November 1995); https://doi.org/10.1117/12.226704

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KEYWORDS

Interferometers

Signal processing

Electronics

Photodiodes

Interferometry

Multimode fibers

Capacitors

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