A Mach-Zehnder interferometric humidity sensor based on waist-enlarged tapers

Min Shao; Xueguang Qiao; Haiwei Fu; Huidong Li; Jianlin Zhao; Yan Li

doi:10.1016/j.optlaseng.2013.07.023

A Mach-Zehnder interferometric humidity sensor based on waist-enlarged tapers

Min Shao, Xueguang Qiao, Haiwei Fu, Huidong Li, Jianlin Zhao, Yan Li

School of Physical Science and Technology

Research output: Contribution to journal › Article › peer-review

80 Scopus citations

Abstract

A novel humidity sensor based on an in-fiber Mach-Zehnder interferometer (MZI) is proposed and demonstrated. The sensor head is formed by a single-mode-multimode-single-mode (SM-MM-SM) fiber structure through arc fusion splicing. The intermodal interference is achieved by two waist-enlarged fiber tapers at the coupling points of the multimode fiber and single-mode fibers. The sensor has a linear response to humidity with enhanced sensitivity of -0.119 dB/%RH in the range of 35-90%RH. Additionally, the sensor exhibited excellent temperature immunity in the temperature test. Such easily fabricated, cost-effective and temperature-immune fiber interferometer could be used for high sensitivity humidity sensing applications.

Original language	English
Pages (from-to)	86-90
Number of pages	5
Journal	Optics and Lasers in Engineering
Volume	52
Issue number	1
DOIs	https://doi.org/10.1016/j.optlaseng.2013.07.023
State	Published - 2014

Keywords

Fiber taper
Humidity sensor
Interferometer
Mach-Zehnder
Multimode fiber

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10.1016/j.optlaseng.2013.07.023

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title = "A Mach-Zehnder interferometric humidity sensor based on waist-enlarged tapers",

abstract = "A novel humidity sensor based on an in-fiber Mach-Zehnder interferometer (MZI) is proposed and demonstrated. The sensor head is formed by a single-mode-multimode-single-mode (SM-MM-SM) fiber structure through arc fusion splicing. The intermodal interference is achieved by two waist-enlarged fiber tapers at the coupling points of the multimode fiber and single-mode fibers. The sensor has a linear response to humidity with enhanced sensitivity of -0.119 dB/%RH in the range of 35-90%RH. Additionally, the sensor exhibited excellent temperature immunity in the temperature test. Such easily fabricated, cost-effective and temperature-immune fiber interferometer could be used for high sensitivity humidity sensing applications.",

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author = "Min Shao and Xueguang Qiao and Haiwei Fu and Huidong Li and Jianlin Zhao and Yan Li",

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T1 - A Mach-Zehnder interferometric humidity sensor based on waist-enlarged tapers

AU - Shao, Min

AU - Qiao, Xueguang

AU - Fu, Haiwei

AU - Li, Huidong

AU - Zhao, Jianlin

AU - Li, Yan

PY - 2014

Y1 - 2014

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AB - A novel humidity sensor based on an in-fiber Mach-Zehnder interferometer (MZI) is proposed and demonstrated. The sensor head is formed by a single-mode-multimode-single-mode (SM-MM-SM) fiber structure through arc fusion splicing. The intermodal interference is achieved by two waist-enlarged fiber tapers at the coupling points of the multimode fiber and single-mode fibers. The sensor has a linear response to humidity with enhanced sensitivity of -0.119 dB/%RH in the range of 35-90%RH. Additionally, the sensor exhibited excellent temperature immunity in the temperature test. Such easily fabricated, cost-effective and temperature-immune fiber interferometer could be used for high sensitivity humidity sensing applications.

KW - Fiber taper

KW - Humidity sensor

KW - Interferometer

KW - Mach-Zehnder

KW - Multimode fiber

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DO - 10.1016/j.optlaseng.2013.07.023

M3 - 文章

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JO - Optics and Lasers in Engineering

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A Mach-Zehnder interferometric humidity sensor based on waist-enlarged tapers

Abstract

Keywords

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