Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect

Based on a dual-loop optoelectronic oscillator (OEO) with Vernier effect, a scheme of fiber Bragg grating (FBG) interrogation system with an improved scale factor has been proposed and experimentally demonstrated. Functioning as the optical carrier of the OEO, the reflection signal of two cascaded F...

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Autores principales:	Xiaozhong Tian, Jingzhan Shi, Yiping Wang, Le Li, Yun She
Formato:	article
Lenguaje:	EN
Publicado:	IEEE 2021
Materias:	Bragg gratings microwave oscillators optoelectronic and photonics sensors optical sensors Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
Acceso en línea:	https://doaj.org/article/85289e09c124445ba19c1f5cd9a224fe
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spelling	oai:doaj.org-article:85289e09c124445ba19c1f5cd9a224fe2021-11-03T23:00:07ZSensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect1943-065510.1109/JPHOT.2021.3119960https://doaj.org/article/85289e09c124445ba19c1f5cd9a224fe2021-01-01T00:00:00Zhttps://ieeexplore.ieee.org/document/9573438/https://doaj.org/toc/1943-0655Based on a dual-loop optoelectronic oscillator (OEO) with Vernier effect, a scheme of fiber Bragg grating (FBG) interrogation system with an improved scale factor has been proposed and experimentally demonstrated. Functioning as the optical carrier of the OEO, the reflection signal of two cascaded FBGs is divided into two optical beams by using a wavelength division multiplexer (WDM). The two optical beams at different wavelengths travel along single mode fibers with different lengths. After combined together by another WDM, the two optical beams go through a section of dispersion compensation fiber (DCF). The oscillating frequency shift of the OEO is determined by the overall time delay, which is affected by the wavelength change of the sensing FBG. Thus, the wavelength change of the sensing FBG can be converted into the oscillating frequency shift of the OEO. Furthermore, due to the length difference between the two optical beams, an obvious Vernier effect has been generated in the frequency response of the OEO. By detecting the frequency shift of the envelope peak of the frequency response curve, the sensitivity of the sensing interrogation can be enhanced greatly. A proof-of-concept OEO-based FBG sensor for axial strain sensing experiment is performed. The experimental results show that the sensitivity is about 0.31 KHz/μϵ for a single-loop OEO. By employing Vernier effect, the sensitivity can be improved to -11 KHz/μϵ, which is 35 times higher than that of the single-loop OEO.Xiaozhong TianJingzhan ShiYiping WangLe LiYun SheIEEEarticleBragg gratingsmicrowave oscillatorsoptoelectronic and photonics sensorsoptical sensorsApplied optics. PhotonicsTA1501-1820Optics. LightQC350-467ENIEEE Photonics Journal, Vol 13, Iss 6, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Bragg gratings microwave oscillators optoelectronic and photonics sensors optical sensors Applied optics. Photonics TA1501-1820 Optics. Light QC350-467
spellingShingle	Bragg gratings microwave oscillators optoelectronic and photonics sensors optical sensors Applied optics. Photonics TA1501-1820 Optics. Light QC350-467 Xiaozhong Tian Jingzhan Shi Yiping Wang Le Li Yun She Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect
description	Based on a dual-loop optoelectronic oscillator (OEO) with Vernier effect, a scheme of fiber Bragg grating (FBG) interrogation system with an improved scale factor has been proposed and experimentally demonstrated. Functioning as the optical carrier of the OEO, the reflection signal of two cascaded FBGs is divided into two optical beams by using a wavelength division multiplexer (WDM). The two optical beams at different wavelengths travel along single mode fibers with different lengths. After combined together by another WDM, the two optical beams go through a section of dispersion compensation fiber (DCF). The oscillating frequency shift of the OEO is determined by the overall time delay, which is affected by the wavelength change of the sensing FBG. Thus, the wavelength change of the sensing FBG can be converted into the oscillating frequency shift of the OEO. Furthermore, due to the length difference between the two optical beams, an obvious Vernier effect has been generated in the frequency response of the OEO. By detecting the frequency shift of the envelope peak of the frequency response curve, the sensitivity of the sensing interrogation can be enhanced greatly. A proof-of-concept OEO-based FBG sensor for axial strain sensing experiment is performed. The experimental results show that the sensitivity is about 0.31 KHz/μϵ for a single-loop OEO. By employing Vernier effect, the sensitivity can be improved to -11 KHz/μϵ, which is 35 times higher than that of the single-loop OEO.
format	article
author	Xiaozhong Tian Jingzhan Shi Yiping Wang Le Li Yun She
author_facet	Xiaozhong Tian Jingzhan Shi Yiping Wang Le Li Yun She
author_sort	Xiaozhong Tian
title	Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect
title_short	Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect
title_full	Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect
title_fullStr	Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect
title_full_unstemmed	Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect
title_sort	sensitivity enhancement for fiber bragg grating strain sensing based on optoelectronic oscillator with vernier effect
publisher	IEEE
publishDate	2021
url	https://doaj.org/article/85289e09c124445ba19c1f5cd9a224fe
work_keys_str_mv	AT xiaozhongtian sensitivityenhancementforfiberbragggratingstrainsensingbasedonoptoelectronicoscillatorwithverniereffect AT jingzhanshi sensitivityenhancementforfiberbragggratingstrainsensingbasedonoptoelectronicoscillatorwithverniereffect AT yipingwang sensitivityenhancementforfiberbragggratingstrainsensingbasedonoptoelectronicoscillatorwithverniereffect AT leli sensitivityenhancementforfiberbragggratingstrainsensingbasedonoptoelectronicoscillatorwithverniereffect AT yunshe sensitivityenhancementforfiberbragggratingstrainsensingbasedonoptoelectronicoscillatorwithverniereffect
_version_	1718445341437591552

Sensitivity Enhancement for Fiber Bragg Grating Strain Sensing Based on Optoelectronic Oscillator With Vernier Effect

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