&lt;title&gt;Progress toward the development of practical fiber Bragg grating instrumentation systems&lt;/title&gt;

Kersey, Alan D.; Davis, M. E.; Berkoff, Timothy A.; Bellemore, David G.; Koo, K.P.; Jones, R. T.

doi:10.1117/12.255381

Cited by 32 publications

(10 citation statements)

References 4 publications

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“…FBG sensors have already been adopted to measure strain or temperature in various civil structures [3,4]. Recently, Takeda and his colleagues also applied these sensors to detect transverse cracks [5] and delamination [6] in CFRP cross-ply laminates.…”

Section: Introductionmentioning

confidence: 99%

A new approach to predicting multiple damage states in composite laminates with embedded FBG sensors

Yashiro

Takeda

Okabe

et al. 2005

Composites Science and Technology

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Section: Introductionmentioning

confidence: 99%

A new approach to predicting multiple damage states in composite laminates with embedded FBG sensors

Yashiro

Takeda

Okabe

et al. 2005

Composites Science and Technology

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“…With various advantages such as high sensibility, electromagnetism immunity, reliability, low costs and small bulk, fiber Bragg gratings sensors have wide application in aerospace, petrol-chemical and electrical industries, and so on [1] . Ultrafast laser induced FBGs by multi-photon absorption mechanism [2] has high performance in extreme temperature application.…”

Section: Introductionmentioning

confidence: 99%

Pattern matching based smart interrogation algorithm for fiber Bragg gratings inscribed by femtosecond laser

Wang

Yang

et al. 2015

SPIE Proceedings

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Fiber Bragg gratings (FBGs) in gold-coated SMF have been successfully inscribed with NIR femtosecond laser and a phase mask for high temperature sensing application. The spectrums of FBGs inscribed by femtosecond laser are broader and asymmetrical with flat-toped profile which degrades the accuracy of FBGs interrogation with common peak detection techniques. A smart interrogation algorithm based on pattern matching (PMSIA) is reported in this paper. In this algorithm, an adjustable fitting spectrum template was proposed which enables the ability to suit for various spectrum patterns was proposed. The results of simulation and experiment demonstrate the noise immunity and threshold reliability of PMSIA. Less than 7pm interrogation error PMSIA was obtained even if the spectrum changes greatly in the very large sensing temperature range (up to 700℃) .

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“…It was possible to expand sensor array to four lines using additional couplers and detectors aided by high signal output power of WSFL. So, this sensor system has more advantage than the system that uses expensive optic devices such as optical switches 9 . The average output power of the laser was 2.22 mW at a pump power of 43 mW, with a variation of less than 1 dB across the full wavelength sweep.…”

Section: Introductionmentioning

confidence: 99%

Strain monitoring of smart composite structures using fiber Bragg grating sensor system

Hong

Kim²,

Kang

et al. 2001

AIAA Space 2001 Conference and Exposition

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Advanced composites are being extensively used for aerospace structures due to the high specific stiffness and high specific strength. The strain measurement of composite structures is of great interest with respect to the structural integrity of aerospace structures. A large number of sensors are required for large-scale structures such as aircraft, rocket, space shuttle, etc. Fiber Bragg grating (FBG) sensor system based on the wavelength division multiplexing (WDM) technology offers a versatile and powerful one for strain monitoring of large structures due to the advantage of multiplexing capability.In this paper, we present an improved FBG sensor system using a wavelength-swept fiber laser (WSFL). The WSFL provides unique and powerful output characteristics useful for a large number of sensor interrogations without any other expensive optic devices such as optical switches. Using the FBG sensor system, we monitored strains of a smart composite wing box model and a filament wound composite tank. All strain data can be visualized in real time and processed by a computer. Strains measured by FBG sensors were compared with strains measured by electrical strain gages.

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<title>Progress toward the development of practical fiber Bragg grating instrumentation systems</title>

Cited by 32 publications

References 4 publications

A new approach to predicting multiple damage states in composite laminates with embedded FBG sensors

A new approach to predicting multiple damage states in composite laminates with embedded FBG sensors

Pattern matching based smart interrogation algorithm for fiber Bragg gratings inscribed by femtosecond laser

Strain monitoring of smart composite structures using fiber Bragg grating sensor system

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