Sensitivity enhancement in low cutoff wavelength long-period fiber gratings by cladding diameter reduction

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dc.contributor.authorDel Villar, Ignacio
dc.contributor.authorPartridge, Matthew
dc.contributor.authorRodriguez, Wenceslao Eduardo
dc.contributor.authorFuentes, Omar
dc.contributor.authorSocorro, Abian Bentor
dc.contributor.authorDiaz, Silvia
dc.contributor.authorCorres, Jesus Maria
dc.contributor.authorJames, Stephen Wayne
dc.contributor.authorTatam, Ralph P.
dc.date.accessioned2017-10-05T12:59:36Z
dc.date.available2017-10-05T12:59:36Z
dc.date.issued2017-09-13
dc.description.abstractThe diameter of long-period fiber gratings (LPFGs) fabricated in optical fibers with a low cutoff wavelength was be reduced by hydrofluoric acid etching, enhancing the sensitivity to refractive index by more than a factor of 3, to 2611 nm/refractive index unit in the range from 1.333 to 1.4278. The grating period selected for the LPFGs allowed access to the dispersion turning point at wavelengths close to the visible range of the optical spectrum, where optical equipment is less expensive. As an example of an application, a pH sensor based on the deposition of a polymeric coating was analyzed in two situations: with an LPFG without diameter reduction and with an LPFG with diameter reduction. Again, a sensitivity increase of a factor of near 3 was obtained, demonstrating the ability of this method to enhance the sensitivity of thin-film-coated LPFG chemical sensors.en_UK
dc.identifier.citationDel Villar I, Partridge M, Rodriguez W, Fuentes O, Socorro A, Diaz S, Corres J, James S, Tatam R, Sensitivity enhancement in low cutoff wavelength long-period fiber gratings by cladding diameter reduction, Sensors, Vol. 17, Issue 9, 2017, Article number 2094en_UK
dc.identifier.issn1424-8220
dc.identifier.urihttp://dx.doi.org/10.3390/s17092094
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/12598
dc.language.isoenen_UK
dc.publisherMDPIen_UK
dc.rightsAttribution 4.0 International (CC BY 4.0) You are free to: Share — copy and redistribute the material in any medium or format Adapt — remix, transform, and build upon the material for any purpose, even commercially. The licensor cannot revoke these freedoms as long as you follow the license terms. Under the following terms: Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Information: No additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.
dc.subjectFiber optics sensorsen_UK
dc.subjectFiber bragg gratingsen_UK
dc.subjectFibersen_UK
dc.subjectSingle-modeen_UK
dc.subjectEtchingen_UK
dc.subjectpH sensoren_UK
dc.titleSensitivity enhancement in low cutoff wavelength long-period fiber gratings by cladding diameter reductionen_UK
dc.typeArticleen_UK

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