Lossy mode resonance sensors based on nanocoated multimode-coreless-multimode fibre

Vicente, Adrián; Santano, Desiree; Zubiate, Pablo; Urrutia, Aitor; Villar, Ignacio Del; Zamarreño, Carlos R.

doi:10.1016/j.snb.2019.126955

Cited by 21 publications

(11 citation statements)

References 21 publications

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“…Optical properties such as transmittance are interesting data for several reasons. For instance, the presence of water droplets on the coated surface can be detected owing to a variation in the refractive index [ 61 ], which can be measured via optical fiber sensor devices, provided we can have control of the absorption of light due to the coating. In addition, a measure of the transmittance allows us an easy-to-implement way of controlling the coating thickness, which is highly dependent on the process parameters.…”

Section: Resultsmentioning

confidence: 99%

The Role of the Fiber/Bead Hierarchical Microstructure on the Properties of PVDF Coatings Deposited by Electrospinning

et al. 2021

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Among the various polymeric options employed for the deposition of electrospun coatings, poly(vinylidene fluoride) (PVDF) has been widely investigated thanks to its excellent mechanical properties, high chemical resistance, and good thermal stability. In this work, the electrospinning technique is used for the fabrication of functional PVDF fibers in order to identify and evaluate the influence of the experimental conditions on the nanofiber properties in terms of optical transmittance, wettability, corrosion resistance, and surface morphology. Some of these properties can play a relevant role in the prevention of ice formation in aircrafts. According to this, a matrix of 4 × 4 samples of aluminum alloy AA 6061T6 was successfully coated by controlling two operational input parameters such as the resultant applied voltage (from 10 up to 17.5 KV) and the flow rate (from 800 up to 1400 µL/h) for a fixed polymeric precursor concentration (15 wt.%). The experimental results have shown a multilevel fiber-bead structure where the formation of a fiber mesh directly depends on the selected operational parameters. Several microscopy and surface analysis techniques such as confocal microscopy (CM), field emission scanning electron microscopy (FE-SEM), UV/vis spectroscopy, and water contact angle (WCA) were carried out in order to corroborate the morphology, transmittance, and hydrophobicity of the electrospun fiber composite. Finally, the corrosion behavior was also evaluated by electrochemical tests (Tafel curves measurement), showing that the presence of electrospun PVDF fibers produces a relevant improvement in the resultant corrosion resistance of the coated aluminum alloys.

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Section: Resultsmentioning

confidence: 99%

The Role of the Fiber/Bead Hierarchical Microstructure on the Properties of PVDF Coatings Deposited by Electrospinning

et al. 2021

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“…If the SNCS fiber structure is functionalized with a specific material, it can be used for detection of other physical and bio-chemical parameters. The variety of application areas is vast, as testified by these exampole: Li et al sealed ferrofluids in a capillary around the SNCS to measure electric current amplitude with a sensitivity of 2.12 dB/A [72] and Zhang used a U-shaped SNCS with magnetic fluid to measure magnetic field strength with a sensitivity of 3185.2 pm/mT [73]; Wen et al used a ZnO-coated SNCS fiber structure for relative humidity and ethanol detection using a fiber ring laser configuration [74]; Singh et al coated gold nanoparticles (AuNPs), silver nanoparticles (PVA-AgNPs) and graphene oxide (GO) on the NCF to excite surface plasmon polaritons to detect L-Cysteine (L-Cys) molecules [75]; Vicente et al coated SnO2-x on the sensor surface to improve sensitivity and applied the structure to IgG detection with limit of detection (LoD) of 0.6 mg/L [76]; As a final example Cardona-Maya et al used functionalized SNCS to detect goat IgG with LoD of 0.2 mg/L [77].…”

Section: A Sncs Fiber Structurementioning

confidence: 99%

Singlemode-Multimode-Singlemode Fiber Structures for Sensing Applications—A Review

Liu

et al. 2021

IEEE Sensors J.

118

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A singlemode-multimode-singlemode (SMS) fiber structure consists of a short section of multimode fiber fusionspliced between two SMS fibers. The mechanism underpinning the operation of an SMS fiber structure is multimode interference and associated self-imaging. SMS structures can be used in a variety of optical fiber systems but are most commonly used as sensors for a variety of parameters, ranging from macro-world measurands such as temperature, strain, vibration, flow rate, RI and humidity to the micro-world with measurands such as proteins, pathogens, DNA, and specific molecules. While traditional SMS structures employ a short section of standard multimode fiber, a large number of structures have been investigated and demonstrated over the last decade involving the replacement of the multimode fiber section with alternatives such as a hollow core fiber or a tapered fiber. The objective of replacing the multimode fiber has most often been to allow sensing of different measurands or to improve sensitivity. In this paper, several different categories of SMS fiber structures, including traditional SMS, modified SMS and tapered SMS fiber structures are discussed with some theoretical underpinning and reviews of a wide variety of sensing examples and recent advances. The paper then summarizes and compares the performances of a variety of sensors which have been published under a number of headings. The paper concludes by considering the challenges faced by SMS based sensing schemes in terms of their deployment in real world applications and discusses possible future developments of SMS fiber sensors.

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“…The electromagnetic wave enters the insertion from the standard fiber, so we decompose the field of the core mode of SMF-28 fiber into modes of the insertion fiber:

where

is the field of the i th cladding mode of the insertion fiber,

is the field of the core mode of SMF-28 fiber, and m is the number of calculated cladding modes. For this decomposition, we express the coupling coefficients through the following overlap integral [ 11 ]:

…”

Section: Simulation Of Transmission Of Light Through Fiber Insertimentioning

confidence: 99%

“…Some systems with fiber insertions are capable of gas sensing [ 8 ] and chemical sensing [ 9 ]; for example, they can determine the concentration of ethyl alcohol [ 10 ]. The insertion of special fiber can use coreless fiber [ 11 ], multi-core fiber [ 12 ], taper [ 10 ], thin-core fiber [ 13 , 14 ], or multimode fiber [ 15 ]. A combination of two insertions can be used as well [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

Control of Excitation of Cladding Modes by Tapering an Insertion of Special Fiber

Bakurov

Иванов

2021

Sensors

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A method for controlling the excitation of cladding modes by tapering special fiber insertions made of SM450 and coreless fibers is proposed. The coupling coefficients between the core mode and the cladding modes of the tapered fiber insertion are calculated. For the calculation, changes in the effective refractive indices and phases of the fiber core and in the cladding modes upon tapering are found. The field distribution of the core mode of the standard fiber transmitted through fiber insertion is obtained. The transmission characteristics of insertions of SM450 and coreless fibers during tapering are simulated and compared with the experiment. The possibility of controlling the transmission and excitation of various cladding modes is confirmed experimentally.

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Lossy mode resonance sensors based on nanocoated multimode-coreless-multimode fibre

Cited by 21 publications

References 21 publications

The Role of the Fiber/Bead Hierarchical Microstructure on the Properties of PVDF Coatings Deposited by Electrospinning

The Role of the Fiber/Bead Hierarchical Microstructure on the Properties of PVDF Coatings Deposited by Electrospinning

Singlemode-Multimode-Singlemode Fiber Structures for Sensing Applications—A Review

Control of Excitation of Cladding Modes by Tapering an Insertion of Special Fiber

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