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Proceedings Paper

Multimode fiber interferometer with embedded long period grating
Author(s): Ivan Chapalo; Antreas Theodosiou; Kyriacos Kalli; Oleg Kotov
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Paper Abstract

A multimode fiber interferometer, consisting of two fiber segments and a long period grating (LPG) between them, is investigated. We observe that low order excited modes in the first segment were converted to the broad modal distribution in the second segment utilizing the LPG. The interferometer’s signal was measured, when the first and the second fiber segments were subjected to temperature and strain perturbations. On calculating the averaged transfer functions we demonstrated that the interferometer’s sensitivity depends on the fiber segment that was subjected to external perturbations. These results confirm the potential of using LPGs in distributed multimode fiber interferometers having external perturbation localization capability.

Paper Details

Date Published: 28 August 2019
PDF: 4 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111990Q (28 August 2019); doi: 10.1117/12.2541291
Show Author Affiliations
Ivan Chapalo, Saint-Petersburg State Polytechnical Univ. (Russian Federation)
Antreas Theodosiou, Cyprus Univ. of Technology (Cyprus)
Kyriacos Kalli, Cyprus Univ. of Technology (Cyprus)
Oleg Kotov, Saint-Petersburg State Polytechnical Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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