Characteristic analysis of environmental parameters detection based on dual-mode EMCF

Xiao Liang; Yang Li; Jingcong Li

doi:10.1117/12.2504558

12 December 2018 Characteristic analysis of environmental parameters detection based on dual-mode EMCF

Xiao Liang, Yang Li, Jingcong Li

Proceedings Volume 10849, Fiber Optic Sensing and Optical Communication; 108490L (2018) https://doi.org/10.1117/12.2504558
Event: International Symposium on Optoelectronic Technology and Application 2018, 2018, Beijing, China

Abstract

An all-fiber microstructure Mach–Zehnder/Michelson interferometer (MZI/MI) fabricated from dual-mode elliptical multilayer-core fibers (EMCFs) is proposed and experimentally characterized. The index profile of the EMCF is particularly designed to support a distinct dual-mode operation, LP₀₁ and LP₁₁^even modes, with approximately equal excitation coefficients. Thus, the detected interference patterns, rather clean due to the few-mode property, shift as the environmental parameters due to strong interaction between high-order modes and measurands through evanescent waves. The MZI/MI has potential for improving the surrounding refractive indexes (SRI), axial micro-strain and liquid-level measurement resolutions. Both the propagation characteristics and operation principle of such a sensor are demonstrated in detail. A sensitivity of ~213 nm per refractive index unit (RIU) within the SRI range of 1.333–1.373, ~4.98 pm/μɛ within the axial strain range of 0-800 μɛ and ~32 pm/mm within the liquid-level range of 0-35mm are obtained through simulation, respectively.

Citation Download Citation

Xiao Liang, Yang Li, and Jingcong Li "Characteristic analysis of environmental parameters detection based on dual-mode EMCF", Proc. SPIE 10849, Fiber Optic Sensing and Optical Communication, 108490L (12 December 2018); https://doi.org/10.1117/12.2504558

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KEYWORDS

Liquids

Environmental sensing

Refractive index

Sensors

Single mode fibers

Cladding

Interferometers

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