Photoinduced grating-based optical fiber sensors for structural analysis and control

Vries, Marten de; Bhatia, Vikram; D'Alberto, Tiffanie; Arya, Vivek; Claus, Richard O.

doi:10.1016/s0141-0296(97)00074-6

Cited by 17 publications

(9 citation statements)

References 13 publications

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“…The power is monitored and then calibrated against the applied strain. In their work, the authors were able to show that the intensity transmitted through the fibre increases linearly with strain although the strain sensitivity (1.0 × 10 −4 dB/με) was noted to be three time less than conventional single long-period grating fibre sensor [50]. The authors also noted small fluctuation in the transmitted for OSA-based interrogators and broadband light source Bragg gratings inscribed on in-house made dye-doped PMMA perform with UV-beam; strain measurement conducted by means of simple tension of POF.…”

Section: Other Pof-based Sensors For Shm Applicationsmentioning

confidence: 98%

Plastic Optical Fibre Sensors for Structural Health Monitoring: A Review of Recent Progress

et al. 2009

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While a number of literature reviews have been published in recent times on the applications of optical fibre sensors in smart structures research, these have mainly focused on the use of conventional glass-based fibres. The availability of inexpensive, rugged, and large-core plastic-based optical fibres has resulted in growing interest amongst researchers in their use as low-cost sensors in a variety of areas including chemical sensing, biomedicine, and the measurement of a range of physical parameters. The sensing principles used in plastic optical fibres are often similar to those developed in glass-based fibres, but the advantages associated with plastic fibres render them attractive as an alternative to conventional glass fibres, and their ability to detect and measure physical parameters such as strain, stress, load, temperature, displacement, and pressure makes them suitable for structural health monitoring (SHM) applications. Increasingly their applications as sensors in the field of structural engineering are being studied and reported in literature. This article will provide a concise review of the applications of plastic optical fibre sensors for monitoring the integrity of engineering structures in the context of SHM.

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Section: Other Pof-based Sensors For Shm Applicationsmentioning

confidence: 98%

Plastic Optical Fibre Sensors for Structural Health Monitoring: A Review of Recent Progress

et al. 2009

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“…A Bragg grating is a permanent periodic modulation of the refractive index in the core of a single mode optical fiber. The change of the core refraction index is between 10 À5 and 10 À3 , and the length of a Bragg grating is usually around 10 mm, which is much shorter than that of a long period grating (LPG) [22]. This technology originated from the discovery of photosensitivity of germanium doped silica by Hill et al [23] in 1978.…”

Section: Quasi-distributed Sensorsmentioning

confidence: 99%

Recent applications of fiber optic sensors to health monitoring in civil engineering

Song

2004

Engineering Structures

777

404

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“…A number of sensors can be multiplexed along a single optical fiber using wavelength-, frequency-, time-and polarization-division techniques to form one-, two-or three-dimensional distributed sensing systems [8,9]. They do not provide a conducting path through the structure and do not generate additional heat that could potentially damage the structure [10][11][12][13][14]. They do not require electrical isolation from the structural material and do not generate electromagnetic interference; this could be a crucial advantage in some applications [15,16].…”

Section: Ijtroductionmentioning

confidence: 99%

<title>Estimation of the influence of accuracy of the fiber Bragg gratings execution on their parameters</title>

Wójcik

Kisała

2004

SPIE Proceedings

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A new way leading to estimate Fiber Bragg Gratings (FBG) parameters is presented. We describe calculating influence of accuracy of FBG execution on their basic characteristics. In this paper we report and present an FBG element as an optical fiber sensor. An FBG quality characterize two mainly essential parameters. There are Full Width at Half Maximum to stand for FWHM (also presented as z12) and reflection index to stand for R. We examine influence of accuracy of FBG with reference to following quantity: modulation of the refraction index zln and the grating period A. On the basis of well known analytical relationship which describe FWHM and R we have estimated influence of FBG construction on above parameters. After obtain fmal analytical dependences we make suitable graphs to depict all calculations.It has now been more than two decades since the first experiments on the use of optical fibers as sensing elements were conducted. Some of most notable successes in this technology have beed realized in areas including strain and temperature sensing [1]. To date, some types of optical fiber sensors have been commercialized, but it is also true that, among the various techniques that have beed studied, only a limited number of techniques and applications have been commercially successful {2].In comparision with intensometric and interferometric sensors, Fiber Bragg Grating sensors belong to an independent category, which is the most attractive type of fiber optic sensors for embedded sensing [3]. The distinct advantages of FBG sensors, compared with other conventional electric/electronic sensors, can be summarized as fallow: They are lightweight, small and flexible; thus they will not affect the structure integrity of the composite materials and can be integrated with the reinforcing fabrics to form the backbones in structures [4][5][6]. They are based on a single common technology that enables devices to be developed for sensing numerous physical perturbations of mechanical, acoustic, electric, magnetic and thermal nature [7]. A number of sensors can be multiplexed along a single optical fiber using wavelength-, frequency-, time-and polarization-division techniques to form one-, two-or three-dimensional distributed sensing systems [8,9]. They do not provide a conducting path through the structure and do not generate additional heat that could potentially damage the structure [10-14]. They do not require electrical isolation from the structural material and do not generate electromagnetic interference; this could be a crucial advantage in some applications [15,16]. FBG sensors are very well suited for measuring temperature and strain variations. The significant information is directly related to the absolute wavelength change [17]. Quality ofFiber Bragg Gratings characterize two mainly parameters [3]: a) Full Width at Half Maximum FWHM (described also as A2), b) reflection index R.We examined the influence of accuracy of the Fiber Bragg Gratings execution on following quantity: a) refraction index modulation An, b) ...

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Photoinduced grating-based optical fiber sensors for structural analysis and control

Cited by 17 publications

References 13 publications

Plastic Optical Fibre Sensors for Structural Health Monitoring: A Review of Recent Progress

Plastic Optical Fibre Sensors for Structural Health Monitoring: A Review of Recent Progress

Recent applications of fiber optic sensors to health monitoring in civil engineering

<title>Estimation of the influence of accuracy of the fiber Bragg gratings execution on their parameters</title>

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