Optimal contrast function in the unbalanced fiber optic Michelson interferometer for dislocation sensor

Mieczyslaw Szustakowski; Norbert Palka; Wieslaw M. Ciurapinski

doi:10.1117/12.583372

8 September 2004 Optimal contrast function in the unbalanced fiber optic Michelson interferometer for dislocation sensor

Mieczyslaw Szustakowski, Norbert Palka, Wieslaw M. Ciurapinski

Author Affiliations +

Proceedings Volume 5576, Lightguides and their Applications II; (2004) https://doi.org/10.1117/12.583372
Event: Lightguides and their Applications II, 2003, Krasnobrod, Poland

Abstract

Theoretical description of a contrast in an unbalanced fiber optic Michelson's interferometer with a multimode laser was shown. Periodic contrast oscillations, which depend on a laser spectrum, occur if a measuring arm of the interferometer is elongated. Required characteristic features of the contrast for an elongation sensor were determined. Influences of laser spectrum parameters (wavelength, halfwidth and mode spacing) as well as laser mode amplitudes on the contrast were simulated. Optimal spectrum for the dislocation sensor was determined theoretically. A laser which parameters fulfilled the requirements was found and its spectrum was measured. The measured contrast function was very similar to the optimal theoretical plot what proves correctness of the calculations.

Citation Download Citation

Mieczyslaw Szustakowski, Norbert Palka, and Wieslaw M. Ciurapinski "Optimal contrast function in the unbalanced fiber optic Michelson interferometer for dislocation sensor", Proc. SPIE 5576, Lightguides and their Applications II, (8 September 2004); https://doi.org/10.1117/12.583372

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