Fulltext

Curvature and Temperature Measurement Based on a Few-Mode PCF Formed M-Z-I and an Embedded FBG

Liu H 1 , Yang H 2 , Qiao X 3 , Wang Y 4 , Liu X 5 , Lee YS 6 Show all authors , Lim KS 7 , Ahmad H 8

Affiliations 

  • 1 Physics Department, Northwest University, Xi'an 710069, China. fangzdsz@163.com
  • 2 Physics Department, Northwest University, Xi'an 710069, China. yanghz@nwu.edu.cn
  • 3 Physics Department, Northwest University, Xi'an 710069, China. xgqiao@nwu.edu.cn
  • 4 Physics Department, Northwest University, Xi'an 710069, China. yqwang@nwu.edu.cn
  • 5 National Key Laboratory of Thermostructure Composite Materials, Northwestern Polytechnical University, Xi'an 710072, China. liuchong@nwpu.edu.cn
  • 6 Photonics Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia. yensian1110@gmail.com
  • 7 Photonics Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia. kslim@um.edu.my
  • 8 Photonics Research Centre, University of Malaya, 50603 Kuala Lumpur, Malaysia. harith@um.edu.my
Sensors (Basel), 2017 Jul 27;17(8).
PMID: 28749437 DOI: 10.3390/s17081725

Abstract

We have experimentally demonstrated an optical fiber Mach-Zehnder interferometer (MZI) structure formed by a few-mode photonic crystal fiber (PCF) for curvature measurement and inscribed a fiber Bragg grating (FBG) in the PCF for the purpose of simultaneously measuring temperature. The structure consists of a PCF sandwiched between two multi-mode fibers (MMFs). Bending experimental results show that the proposed sensor has a sensitivity of -1.03 nm/m-1at a curvature range from 10 m-1to 22.4 m-1, and the curvature sensitivity of the embedded FBG was -0.003 nm/m-1. Temperature response experimental results showed that the MZI's wavelength, λa, has a sensitivity of 60.3 pm/°C, and the FBG's Bragg wavelength, λb, has sensitivity of 9.2 pm/°C in the temperature range of 8 to 100 °C. As such, it can be used for simultaneous measurement of curvature and temperature over ranges of 10 m-1to 22.4 m-1and 8 °C to 100 °C, respectively. The results show that the embedded FBG can be a good indicator to compensate the varying ambient temperature during a curvature measurement.

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

MeSH terms
Similar publications