Distributed strain measurement with millimeter-order spatial resolution based on Brillouin optical correlation domain analysis

Song, Kwang Yong; He, Zuyuan; Hotate, Kazuo

doi:10.1364/ol.31.002526

Cited by 257 publications

(146 citation statements)

References 9 publications

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“…The authors developed a fiber-optic-based system applicable to large-scale composite structures having a massive number of the bolted joints [9]. Optical fibers were embedded along bolt holes, and the strain change along the optical fiber induced by bearing failure was measured by a Brillouin optical correlation domain analysis (BOCDA), which is a high spatial resolution distributed strain sensing system developed by Hotate et al [10][11][12].…”

Section: Damage Monitoring Of Cfrp Bolted Joints Using Strain Distribmentioning

confidence: 99%

Recent advancement in optical fiber sensing for aerospace composite structures

Minakuchi

Takeda

2013

Photonic Sens

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Optical fiber sensors have attracted considerable attention in health monitoring of aerospace composite structures. This paper briefly reviews our recent advancement mainly in Brillouin-based distributed sensing. Damage detection, life cycle monitoring and shape reconstruction systems applicable to large-scale composite structures are presented, and new technical concepts, "smart crack arrester" and "hierarchical sensing system", are described as well, highlighting the great potential of optical fiber sensors for the structural health monitoring (SHM) field.

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Section: Damage Monitoring Of Cfrp Bolted Joints Using Strain Distribmentioning

confidence: 99%

Recent advancement in optical fiber sensing for aerospace composite structures

Minakuchi

Takeda

2013

Photonic Sens

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“…Therefore, it confirms the high potential of this type of distributed sensing system based on a long and weak FBG. Actually, the principle to realize distributed sensing is conceptually similar to other time-domain distributed sensing systems, such as Brillouin-based fiber sensors [12,13]. However, this system presents crucial advantages: no need of optical pumping to generate a temporary reflecting grating along the sensing fiber since the FBG is static in fiber and the reflection process is passive.…”

Section: Experimental Setup For Sensing Applicationsmentioning

confidence: 99%

Time-frequency analysis of long fiber Bragg gratings with low reflectivity

Sancho¹,

Chin²,

Barrera³

et al. 2013

Opt. Express

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Abstract:A new technique to investigate the spatial distribution of the reflection spectrum along fabricated long weak fiber Bragg gratings (FBG) is experimentally demonstrated, together with its potential applications for distributed fiber sensing and broadband signal processing. A short pulsed coherent light signal is launched into a FBG and the signal frequency is scanned through the FBG reflection spectrum. When the pulse duration is set much shorter than the transit time through the grating a time-resolved reflected signal can be obtained for each signal frequency. It informs about the distribution of the refractive index periodic perturbation along the entire FBG length, hence the uniformity or frequency chirp information of the fabricated FBG. This technique has been implemented to demonstrate a distributed temperature sensing system with high spatial resolution and to also realize a robust all-fiber tunable delay line for broadband signals.

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“…Over the last two decades, Brillouin scattering has widely been studied for distributed sensing application using optical fibres [1][2][3]. Compared to other techniques, Brillouin Optical Time-Domain Analysis (BOTDA) has attracted particular attention for distributed sensing of temperature and/or strain in petrol and civil engineering industries.…”

Section: Introductionmentioning

confidence: 99%