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High-sensitivity humidity sensor based on microknot resonator assisted agarose-coated mach-zehnder interferometer

High-sensitivity humidity sensor based on microknot resonator assisted agarose-coated mach-zehnder interferometer
High-sensitivity humidity sensor based on microknot resonator assisted agarose-coated mach-zehnder interferometer
An optical fiber humidity sensor with a microfiber knot resonator (MKR) nested U-shaped Mach-Zehnder (MZ) interferometer based on the Vernier effect is proposed. While the reference arm is protected by cured ultraviolet glue, the sensing arm is coated by agarose. The Vernier effect is realized by superimposing the comb-like transmission spectra of the MKR and MZ interfernce, which are designed to have slightly different free spectral ranges. Experimental results indicate that the proposed sensor can provide a maximum humidity sensitivity of 2.442 nm/%RH with a measurement range from 60% RH to 95% RH. The sensor temperature response, reversibility and repeatability are also investigated. The response time is found to be 102 ms for a change of 30% RH. This sensor not only retains key features and merits of the MKR, including low cost and small footprint, but also has a simpler preparation process compared with conventional sensors based on the Vernier effect.
0733-8724
Yi, Yating
5fd4439a-1dc9-477a-8a2f-716ac61751ca
Jiang, Yuxuan
1cdd584c-b8de-4989-b4f3-1c38046290cd
Zhao, Haiyan
032a2c46-295a-4aa5-8bea-a66d71af2153
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Fan, Yaxian
27d38d7e-244f-4d09-9bf2-47278cd8391e
Wang, Pengfei
4ae6cc7c-72fc-42d5-9179-67d36477e758
Yi, Yating
5fd4439a-1dc9-477a-8a2f-716ac61751ca
Jiang, Yuxuan
1cdd584c-b8de-4989-b4f3-1c38046290cd
Zhao, Haiyan
032a2c46-295a-4aa5-8bea-a66d71af2153
Brambilla, Gilberto
815d9712-62c7-47d1-8860-9451a363a6c8
Fan, Yaxian
27d38d7e-244f-4d09-9bf2-47278cd8391e
Wang, Pengfei
4ae6cc7c-72fc-42d5-9179-67d36477e758

Yi, Yating, Jiang, Yuxuan, Zhao, Haiyan, Brambilla, Gilberto, Fan, Yaxian and Wang, Pengfei (2021) High-sensitivity humidity sensor based on microknot resonator assisted agarose-coated mach-zehnder interferometer. Journal of Lightwave Technology. (doi:10.1109/JLT.2021.3135246).

Record type: Article

Abstract

An optical fiber humidity sensor with a microfiber knot resonator (MKR) nested U-shaped Mach-Zehnder (MZ) interferometer based on the Vernier effect is proposed. While the reference arm is protected by cured ultraviolet glue, the sensing arm is coated by agarose. The Vernier effect is realized by superimposing the comb-like transmission spectra of the MKR and MZ interfernce, which are designed to have slightly different free spectral ranges. Experimental results indicate that the proposed sensor can provide a maximum humidity sensitivity of 2.442 nm/%RH with a measurement range from 60% RH to 95% RH. The sensor temperature response, reversibility and repeatability are also investigated. The response time is found to be 102 ms for a change of 30% RH. This sensor not only retains key features and merits of the MKR, including low cost and small footprint, but also has a simpler preparation process compared with conventional sensors based on the Vernier effect.

Text
Revised Manuscript ID JLT-28981-2021 no markups - Accepted Manuscript
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Accepted/In Press date: 9 December 2021
Published date: 14 December 2021

Identifiers

Local EPrints ID: 454258
URI: http://eprints.soton.ac.uk/id/eprint/454258
ISSN: 0733-8724
PURE UUID: 425dfe8e-39d3-4aa8-bef7-2089ced6ad81
ORCID for Gilberto Brambilla: ORCID iD orcid.org/0000-0002-5730-0499

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Date deposited: 03 Feb 2022 17:54
Last modified: 17 Mar 2024 02:53

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Contributors

Author: Yating Yi
Author: Yuxuan Jiang
Author: Haiyan Zhao
Author: Gilberto Brambilla ORCID iD
Author: Yaxian Fan
Author: Pengfei Wang

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