Characterization of miniature fiber-optic Fabry-Perot interferometric sensors based on hollow silica tube

Pinggang Jia,Guocheng Fang,Daihua Wang

doi:10.1007/s13320-016-0327-7

Pinggang Jia, Guocheng Fang + Show 1 more

Open Access

https://doi.org/10.1007/s13320-016-0327-7

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Journal: Photonic Sensors	Publication Date: Jun 23, 2016
Citations: 5	License type: CC BY 4.0

Affiliation: Chongqing University, North University of China

Abstract

Abstract A miniature fiber-optic Fabry-Perot interferometer (MOFPI) fabricated by splicing a hollow silica tube (HST) with inner diameter of 4 µm to the end of a single-mode fiber is investigated and experimentally demonstrated. The theoretical relationship between the free spectrum range and the length of HST is verified by fabricating several MOFPIs with different lengths. We characterize the MOFPIs for temperature, liquid refractive index, and strain. Experimental results show that the sensitivities of the temperature, liquid refractive index, and strain are 16.42 pm/°C,–118.56 dB/RIU, and 1.21 pm/µε, respectively.

Highlights

Miniature fiber-optic interferometers have attracted broad attention for their advantages of simple structure, compact size, immunity to electromagnetic interference, high sensitivity and accuracy, and so on
An miniature fiber-optic Fabry-Perot interferometer (MOFPI) fabricated by splicing a hollow silica tube with inner diameter of 4 μm to the end of an single mode fibers (SMF) is investigated and experimentally demonstrated
We characterized the MOFPIs for temperature, liquid refractive index (RI), and strain

Summary

Introduction

Photonic Sensors fabricated by inserting two well-cut fibers oppositely into an HST and fusing those together [16], or fusing a section of HST between two single mode fibers (SMF) [17]. Sun et al [18] presented an optical fiber strain and temperature sensor based on an in-line Mach-Zehnder interferometer using thin-core fiber. Huang et al [19] firstly presented an MOFPI based on HST with small inner diameter. They spliced an HST with 5-μm inner diameter to the tip of an SMF to fabricate a novel MOFPI. Frazao et al [21] presented an MOFPI by splicing an HST with a 20-μm inner diameter to the tip of an SMF. An MOFPI fabricated by splicing a hollow silica tube with inner diameter of 4 μm to the end of an SMF is investigated and experimentally demonstrated. The MOFPIs for temperature, liquid refractive index, and strain are characterized

Configuration and operating principle

Experiment

Conclusions