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Multi-parameter optical fiber sensor based on enhanced multimode interference

Author:
Luo, Yiyang   Xia, Li   Yu, Can   Li, Wei   Sun, Qizhen   Wang, Yuanwu   Liu, Deming  


Journal:
Optics Communications


Issue Date:
2015


Abstract(summary):

In this paper, a multi-parameter optical fiber sensor based on all-fiber in-line single-mode-multimode-no-core-single-mode (SMNS) structure is proposed and experimentally demonstrated. A section of multimode fiber (MMF) is utilized as the mode coupler to enhance the multimode interference (MMI). A 58.5 mm long no-core fiber (NCF) acts as the sensing head, which is modified by the surrounding medium. The experimental results exhibit that the sensor possesses a water level sensitivity of 215.98 pm/mm by monitoring the wavelength shift at 1586.03 nm, and -0.11 dB/mm of the power attenuation at the wavelength of 1600.05 nm with a measurement range of 58.33 mm. At the same time, the RI sensitivities of 131.71 nm/RIU and the axial strain sensitivity of -1.21 pm/mu epsilon are also obtained. (C) 2015 Elsevier B.V. All rights reserved.


Page:
120-124


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