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dc.contributor.authorWahl, Markus Solberg
dc.contributor.authorWilhelmsen, Øivind
dc.contributor.authorHjelme, Dag Roar
dc.date.accessioned2019-10-01T05:58:05Z
dc.date.available2019-10-01T05:58:05Z
dc.date.created2019-09-16T11:16:40Z
dc.date.issued2019
dc.identifier.citationSensors. 2019, 19 (18), 4030.nb_NO
dc.identifier.issn1424-8220
dc.identifier.urihttp://hdl.handle.net/11250/2619455
dc.description.abstractabrication of multimode fiber optic interferometers requires accurate control of certain parameters to obtain reproducible results. This paper evaluates the consequences of practical challenges in fabricating reflection-based, fiber optic interferometers by the use of theory and experiments. A guided-mode propagation approach is used to investigate the effect of the end-face cleave angle and the accuracy of the splice in core-mismatched fiber optic sensors. Cleave angles from high-end fiber cleavers give differences in optical path lengths approaching the wavelength close to the circumference of the fiber, and the core-mismatched splice decides the ensemble of cladding modes excited. This investigation shows that the cleave angle may significantly alter the spectrum, whereas the splice is more robust. It is found that the interferometric visibility can be decreased by up to 70% for cleave angles typically obtained. An offset splice may reduce the visibility, but for offsets experienced experimentally the effect is negligible. An angled splice is found not to affect the visibility but causes a lower overall intensity in the spectrum. The sensitivity to the interferometer length is estimated to 60 nm/mm, which means that a 17 µm difference in length will shift the spectrum 1 nm. Comparisons to experimental results indicate that the spliced region also plays a significant role in the resulting spectrum.nb_NO
dc.language.isoengnb_NO
dc.publisherMDPInb_NO
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleAddressing Challenges in Fabricating Reflection-2 Based Fiber Optic Interferometersnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionpublishedVersionnb_NO
dc.source.volume19nb_NO
dc.source.journalSensorsnb_NO
dc.source.issue18nb_NO
dc.identifier.doi10.3390/s19184030
dc.identifier.cristin1725023
dc.description.localcode© 2019 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).nb_NO
cristin.unitcode194,63,35,0
cristin.unitcode194,64,25,0
cristin.unitnameInstitutt for elektroniske systemer
cristin.unitnameInstitutt for energi- og prosessteknikk
cristin.ispublishedfalse
cristin.fulltextoriginal
cristin.qualitycode1


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