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Sensitivity-Enhanced Fiber Temperature Sensor Based on Vernier Effect and Dual In-Line Mach–Zehnder Interferometers | IEEE Journals & Magazine | IEEE Xplore

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Journals & Magazines >IEEE Sensors Journal >Volume: 19 Issue: 18

Sensitivity-Enhanced Fiber Temperature Sensor Based on Vernier Effect and Dual In-Line Mach–Zehnder Interferometers

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Abstract:

A highly sensitive fiber temperature sensor based on in-line Mach-Zehnder interferometers (MZIs) and Vernier effect was proposed and experimentally demonstrated. The MZI ...Show More

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Abstract:

A highly sensitive fiber temperature sensor based on in-line Mach-Zehnder interferometers (MZIs) and Vernier effect was proposed and experimentally demonstrated. The MZI was fabricated by splicing a section of hollow core fiber between two pieces of multimode fiber. The temperature sensitivity obtained by extracting envelope dip shift of the superimposed spectrum reaches to 528.5 pm/°C in the range of 0 °C-100 °C, which is 17.5 times as high as that without enhanced by the Vernier effect. The experimental sensitivity amplification factor is close to the theoretical predication (18.3 times).The proposed sensitivity enhancement system employs parallel connecting to implement the Vernier effect, which possesses the advantages of easy fabrication and high flexibility.

Published in: IEEE Sensors Journal ( Volume: 19, Issue: 18, 15 September 2019)

Page(s): 7983 - 7987

Date of Publication: 15 May 2019

ISSN Information:

DOI: 10.1109/JSEN.2019.2916891

Funding Agency:

References is not available for this document.

I. Introduction

Various in-line Mach-Zehnder interferometer (MZI) temperature sensors with different structures were proposed, such as core misaligned splicing [1], [2], femtosecond laser fabricating [3], [4], fiber tapered [5], [6], photonic crystal fiber (PCF) based [7]–[9]. However, sensitivities of most the mentioned in-line MZI temperature sensors are just about several pm to dozens pm/°C.

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References is not available for this document.