Multiplexing a serial array of tapered optical fibre sensors using coherent optical frequency domain reflectometry

Jarzebinska, Renata; Chehura, Edmon; James, Stephen W.; Tatam, Ralph P.

doi:10.1088/0957-0233/23/10/105203

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…Changes in the attenuation of the Rayleigh backscattered signal from the tapered regions were used to monitor the RI of the surrounding medium. An analysis of the performance of the system showed that, for tapers of diameter 50 μm, up to nine tapers could be multiplexed using commercial OFDR instrumentation [62].…”

Section: Applications Of Tapered Optical Fibre Sensorsmentioning

confidence: 99%

Tapered Optical Fibre Sensors: Current Trends and Future Perspectives

Korposh

James

Lee

et al. 2019

Sensors

148

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The development of reliable, affordable and efficient sensors is a key step in providing tools for efficient monitoring of critical environmental parameters. This review focuses on the use of tapered optical fibres as an environmental sensing platform. Tapered fibres allow access to the evanescent wave of the propagating mode, which can be exploited to facilitate chemical sensing by spectroscopic evaluation of the medium surrounding the optical fibre, by measurement of the refractive index of the medium, or by coupling to other waveguides formed of chemically sensitive materials. In addition, the reduced diameter of the tapered section of the optical fibre can offer benefits when measuring physical parameters such as strain and temperature. A review of the basic sensing platforms implemented using tapered optical fibres and their application for development of fibre-optic physical, chemical and bio-sensors is presented.

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Section: Applications Of Tapered Optical Fibre Sensorsmentioning

confidence: 99%

Tapered Optical Fibre Sensors: Current Trends and Future Perspectives

Korposh

James

Lee

et al. 2019

Sensors

148

View full text Add to dashboard Cite

show abstract

“…This effect is accompanied by a local increase in attenuation of the fibre, which is sensitive to the refractive index of the surrounding medium. An optical fibre taper can be interrogated using coherent optical frequency domain reflectometry (OFDR) 11 which is a distributed measurement technique capable of identifying changes in attenuation of an optical fibre with high spatial resolution. The OFDR is particularly suitable for interrogating serially multiplexed fibre tapers.…”

Section: Optical Fibre Tapered Sensorsmentioning

confidence: 99%

Multiplexed fibre optic sensors for monitoring resin infusion, flow, and cure in composite material processing

et al. 2013

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The infusion, flow and cure of RTM6 resin in a carbon fibre reinforced composite preform have been monitored using a variety of multiplexed fibre optic sensors. Optical fibre Fresnel sensors and tilted fibre Bragg grating (TFBG) sensors were configured to monitor resin infusion/flow in-plane of the component. The results obtained from the different sensors were in good agreement with visual observations. The degree of cure was monitored by Fresnel sensors via a measurement of the refractive index of the resin which was converted to degree of cure using a calibration determined from Differential Scanning Calorimetry. Fibre Bragg grating sensors fabricated in highly linearly birefringent fibre were used to monitor the development of transverse strain during the cure process, revealing through-thickness material shrinkage of about 712  and residual strain of 223 . An alternative approach to infusion monitoring, based on an array of multiplexed tapered optical fibre sensors interrogated using optical frequency domain reflectometry, was also investigated in a separate carbon fibre preform that was infused with RTM6 resin.

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“…Fibre optic sensors can be embedded readily into composite materials [1,5], with their impact on the integrity of the structure being dependent on the orientation of the optical fibre with respect to the reinforcing fibres of the composite material [7]. The use of optical fibre sensing technologies to monitor composite material processes of infusion and cure has been reported widely, exploiting devices such as Fresnel refractometers [8,9], etched [5] and tapered [10] fibres, long period gratings (LPGs) [11], fibre Bragg gratings (FBGs) [12] and tilted fibre Bragg gratings (TFBGs) [11] embedded within the material. Table 1 provides a summary of the capabilities of some common optical and non-optical sensing technologies for composite material processing.…”

Section: Introductionmentioning

confidence: 99%

Resin Directional Flow and Degree of Cure Sensing Using Chirped Optical Fiber Long Period Gratings

et al. 2017

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The use of chirped long period gratings (CLPGs) for monitoring the flow, the direction of the flow and the subsequent cure of an epoxy resin is presented. The asymmetric properties of the CLPG and its sensitivity to refractive index changes were exploited to facilitate the measurement of the direction of the flow. The performances of a continuously chirped LPG (CCLPG) and a step chirped LPG (SCLPG) were compared, with the CCLPG showing improved spatial resolution. The CCLPG and SCLPG were also used to monitor changes in the refractive index of the resin during cure, with the results showing close agreement with measurements undertaken simultaneously using a fibre optic Fresnel refractometer.

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Multiplexing a serial array of tapered optical fibre sensors using coherent optical frequency domain reflectometry

Cited by 5 publications

References 19 publications

Tapered Optical Fibre Sensors: Current Trends and Future Perspectives

Tapered Optical Fibre Sensors: Current Trends and Future Perspectives

Multiplexed fibre optic sensors for monitoring resin infusion, flow, and cure in composite material processing

Resin Directional Flow and Degree of Cure Sensing Using Chirped Optical Fiber Long Period Gratings

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