Multimode fiber interferometer with embedded long period grating

Ivan Chapalo; Antreas Theodosiou; Kyriacos Kalli; Oleg Kotov

doi:10.1117/12.2541291

28 August 2019 Multimode fiber interferometer with embedded long period grating

Ivan Chapalo, Antreas Theodosiou, Kyriacos Kalli, Oleg Kotov

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111990Q (2019) https://doi.org/10.1117/12.2541291
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

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.

Citation Download Citation

Ivan Chapalo, Antreas Theodosiou, Kyriacos Kalli, and Oleg Kotov "Multimode fiber interferometer with embedded long period grating", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111990Q (28 August 2019); https://doi.org/10.1117/12.2541291

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