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Photonic Sensors

, Volume 9, Issue 1, pp 78–88 | Cite as

Axial Micro-Strain Sensor Based on Resonance Demodulation Technology Via Dual-Mode CMECF

  • Xiao LiangEmail author
  • Tigang Ning
  • Jingcong Li
  • Yang Li
  • Zhiming Liu
Open Access
Regular
  • 46 Downloads

Abstract

This paper firstly and experimentally demonstrates an in-fiber axial micro-strain sensing head, combined with a Mach-Zehnder interferometer (MZI) based on the concentric multilayer elliptical-core fiber (CMECF). This MZI with a high extinction ratio (about 15 dB) is successfully achieved with a CMECF-single mode fiber-CMECF (CSC) structure. The MZI sensor theory and the resonance demodulation technology are systematically described in this paper. In this CSC structure, two sections of the CMECF have a role as the mode generator and coupler, respectively. LP01 and LP11even, which have similar excitation coefficients, are two dominated propagating mode groups supported in the CMECF. On account of the distinct dual-mode property, a good stability of this sensor is realized. The detected resonance in the MZI shifts as the axial micro-strain variated due to the strong interaction between higher order modes. High sensitivity of ∼1.78 pm/με is experimentally achieved within the range of 0 με–1250 με, meanwhile, the intensity fluctuation is below 0.38 dB.

Keywords

Few-mode fiber fiber sensor MZI axial micro-strain 

Notes

Acknowledgment

This work was supported by the Major State Basic Research Development Program of China (Granted No. 2010CB328206), the “Double Tops” Construction Funds of Minzu University of China (Granted No. 018004032101), the Young Teachers’ Research Project of Minzu University of China, and in part by the Fundamental Research Funds for the Central Universities, China.

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Copyright information

© The Author(s) 2018

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (https://doi.org/creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Xiao Liang
    • 1
    Email author
  • Tigang Ning
    • 2
  • Jingcong Li
    • 1
  • Yang Li
    • 2
  • Zhiming Liu
    • 3
  1. 1.College of ScienceMinzu University of ChinaBeijingChina
  2. 2.Institute of Lightwave TechnologyBeijing Jiaotong UniversityBeijingChina
  3. 3.The 41st Research Institute of CETCQingdaoChina

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