Two interrogated FBG spectral linewidth for strain sensing through correlation

Shih Hsiang Hsu; Kuo Wei Chuang; Ci Syu Chen; Ching Yu Lin; Che Chang Chang

doi:10.3390/s17122837

Two interrogated FBG spectral linewidth for strain sensing through correlation

Shih Hsiang Hsu, Kuo Wei Chuang, Ci Syu Chen, Ching Yu Lin, Che Chang Chang

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

Abstract

The spectral linewidth from two cross-correlated fiber Bragg gratings (FBGs) are interrogated and characterized using a delayed self-homodyne method for fiber strain sensing. This approach employs a common higher frequency resolution instead of wavelength. A sensitivity and resolution of 166 MHz/με and 50 nε were demonstrated from 4 GHz spectral linewidth characterization on the electric spectrum analyzer. A 10 nε higher resolution can be expected through random noise analyses when the spectral linewidth from two FBG correlations is reduced to 1 GHz. Moreover, the FBG spectrum is broadened during strain and experimentally shows a 0.44 pm/με sensitivity, which is mainly caused by the photo elastic effect from the fiber grating period stretch.

Original language	English
Article number	2837
Journal	Sensors (Switzerland)
Volume	17
Issue number	12
DOIs	https://doi.org/10.3390/s17122837
Publication status	Published - Dec 7 2017

Keywords

Correlation
Fiber bragg gratings
Fiber optics sensors
Remote sensing and sensors
Spectral linewidth

ASJC Scopus subject areas

Analytical Chemistry
Atomic and Molecular Physics, and Optics
Biochemistry
Instrumentation
Electrical and Electronic Engineering

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10.3390/s17122837

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title = "Two interrogated FBG spectral linewidth for strain sensing through correlation",

abstract = "The spectral linewidth from two cross-correlated fiber Bragg gratings (FBGs) are interrogated and characterized using a delayed self-homodyne method for fiber strain sensing. This approach employs a common higher frequency resolution instead of wavelength. A sensitivity and resolution of 166 MHz/με and 50 nε were demonstrated from 4 GHz spectral linewidth characterization on the electric spectrum analyzer. A 10 nε higher resolution can be expected through random noise analyses when the spectral linewidth from two FBG correlations is reduced to 1 GHz. Moreover, the FBG spectrum is broadened during strain and experimentally shows a 0.44 pm/με sensitivity, which is mainly caused by the photo elastic effect from the fiber grating period stretch.",

keywords = "Correlation, Fiber bragg gratings, Fiber optics sensors, Remote sensing and sensors, Spectral linewidth",

author = "Hsu, {Shih Hsiang} and Chuang, {Kuo Wei} and Chen, {Ci Syu} and Lin, {Ching Yu} and Chang, {Che Chang}",

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T1 - Two interrogated FBG spectral linewidth for strain sensing through correlation

AU - Hsu, Shih Hsiang

AU - Chuang, Kuo Wei

AU - Chen, Ci Syu

AU - Lin, Ching Yu

AU - Chang, Che Chang

PY - 2017/12/7

Y1 - 2017/12/7

N2 - The spectral linewidth from two cross-correlated fiber Bragg gratings (FBGs) are interrogated and characterized using a delayed self-homodyne method for fiber strain sensing. This approach employs a common higher frequency resolution instead of wavelength. A sensitivity and resolution of 166 MHz/με and 50 nε were demonstrated from 4 GHz spectral linewidth characterization on the electric spectrum analyzer. A 10 nε higher resolution can be expected through random noise analyses when the spectral linewidth from two FBG correlations is reduced to 1 GHz. Moreover, the FBG spectrum is broadened during strain and experimentally shows a 0.44 pm/με sensitivity, which is mainly caused by the photo elastic effect from the fiber grating period stretch.

AB - The spectral linewidth from two cross-correlated fiber Bragg gratings (FBGs) are interrogated and characterized using a delayed self-homodyne method for fiber strain sensing. This approach employs a common higher frequency resolution instead of wavelength. A sensitivity and resolution of 166 MHz/με and 50 nε were demonstrated from 4 GHz spectral linewidth characterization on the electric spectrum analyzer. A 10 nε higher resolution can be expected through random noise analyses when the spectral linewidth from two FBG correlations is reduced to 1 GHz. Moreover, the FBG spectrum is broadened during strain and experimentally shows a 0.44 pm/με sensitivity, which is mainly caused by the photo elastic effect from the fiber grating period stretch.

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KW - Fiber optics sensors

KW - Remote sensing and sensors

KW - Spectral linewidth

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Two interrogated FBG spectral linewidth for strain sensing through correlation

Abstract

Keywords

ASJC Scopus subject areas

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