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dc.contributor.authorJohny, Jincy
dc.contributor.authorSmith, Thomas
dc.contributor.authorBhavsar, Kaushalkumar
dc.contributor.authorPrabhu, Radhakrishna
dc.date.accessioned2018-01-29T09:50:50Z
dc.date.available2018-01-29T09:50:50Z
dc.date.issued2017-06-19en
dc.identifier.citationJOHNY, J., SMITH, T., BHAVSAR, K. and PRABHU, R. 2017. Design of optical fibre based highly sensitive acoustic sensor for underwater applications. In Proceedings of the 60th MTS/IEEE OCEANS conference (OCEANS'17): a vision for sustaining our marine futures, 19-22 June 2017, Aberdeen, UK. New York: IEEE [online], article ID 8084974. Available from: https://doi.org/10.1109/OCEANSE.2017.8084974en
dc.identifier.isbn9781538621110en
dc.identifier.isbn9781509052783en
dc.identifier.urihttp://hdl.handle.net/10059/2696
dc.description.abstractFibre optic sensing is a key technology for a variety of underwater sensing and monitoring applications. Fibre optic acoustic sensors are mainly based on interferometric detection approach where the acoustic pressure-induced phase shift of light has been used as sensing principle. Recently, fibre optic acoustic sensors based on speciality fibres like Photonic Crystal Fibre (PCF) were reported. However, interferometry based detection approaches amongst all these fibre optics sensors are intensity based and therefore susceptible to light power fluctuations and require a complex instrumentation related to signal detection. Besides, wavelength based detection approach using FBG (Fibre Bragg Grating) offers significant advantages over the conventional approach. FBG sensors were reported to have higher performance for underwater acoustic sensing applications. This paper reports a novel design of an underwater acoustic pressure sensor using a combination of PCF and FBG to provide high sensitivity. Theoretical investigations were carried out on the PCF-FBG sensor to study the effect of applied pressure and induced strain on the FBG inscribed in the core of PCF. Effect of light confinement in PCF was studied for different geometrical parameters and 4-ring PCF structure was reported. Further, sensitivity enhancement was proposed utilizing air hole structure of the PCF to enhance the impact of acoustic pressure on the induced strain in FBG.en
dc.language.isoengen
dc.publisherIEEEen
dc.rightshttps://creativecommons.org/licenses/by-nc/4.0en
dc.rightsAttribution-NonCommercial 4.0 International*
dc.rights.urihttp://creativecommons.org/licenses/by-nc/4.0/*
dc.subjectAcoustic sensorsen
dc.subjectOpitical fibreen
dc.subjectInterferometryen
dc.subjectPCFen
dc.subjectFBGen
dc.titleDesign of optical fibre based highly sensitive acoustic sensor for underwater applications.en
dc.typeConference publicationsen
dc.publisher.urihttps://doi.org/10.1109/OCEANSE.2017.8084974en
dcterms.publicationdate2017-10-26en
refterms.accessExceptionNAen
refterms.depositExceptionNAen
refterms.panelUnspecifieden
refterms.technicalExceptionNAen
refterms.versionAMen
rioxxterms.publicationdate2017-06-19en
rioxxterms.typeConference Paper/Proceeding/Abstracten
rioxxterms.versionAMen


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