Fiberoptic Temperature Sensors Based on Differential Spectral Transmittance Reflectivity And Multiplexed Sensing Systems

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dc.contributorVirginia Techen
dc.contributor.authorWang, A.en
dc.contributor.authorWang, G. Z.en
dc.contributor.authorMurphy, Kent A.en
dc.contributor.authorClaus, Richard O.en
dc.contributor.departmentFiber & ElectroOptics Research Center (FEORC)en
dc.date.accessed2014-02-24en
dc.date.accessioned2014-04-04T15:12:17Zen
dc.date.available2014-04-04T15:12:17Zen
dc.date.issued1995-07-01en
dc.description.abstractA concept for optical temperature sensing based on the differential spectral reflectivity/transmittance from a multilayer dielectric edge filter is described and demonstrated. Two wavelengths, lambda(1) and lambda(2), from the spectrum of a broadband light source are selected so that they are located on the sloped and flat regions of the reflection or transmission spectrum of the filter, respectively. As temperature variations shift the reflection or transmission spectrum of the filter, they change the output power of the light at lambda(1), but the output power of the light at lambda(2) is insensitive to the shift and therefore to the temperature variation. The temperature information can be extracted from the ratio of the light powers at lambda(1) to the light at lambda(2). This ratio is immune to changes in the output power of the light source, fiber losses induced by microbending, and hence modal-power distribution fluctuations. The best resolution of 0.2 degrees C has been obtained over a range of 30-120 degrees C. Based on such a basic temperature-sensing concept, a wavelength-division-multiplexed, temperature-sensing system is constructed by cascading three sensing-edge filters that have different cutoff wavelengths along a multimode fiber. The signals from the three sensors are resolved by detecting the correspondent outputs at different wavelengths.en
dc.description.sponsorshipVirginia Center for Innovative Technologyen
dc.description.sponsorshipFiber and Sensor Technologies, Inc.en
dc.identifier.citationAnbo Wang, George Z. Wang, Kent A. Murphy, and Richard O. Claus, "Fiber-optic temperature sensors based on differential spectral transmittance/reflectivity and multiplexed sensing systems," Appl. Opt. 34, 2295-2300 (1995). doi: 10.1364/AO.34.002295en
dc.identifier.doihttps://doi.org/10.1364/AO.34.002295en
dc.identifier.issn0003-6935en
dc.identifier.urihttp://hdl.handle.net/10919/46905en
dc.identifier.urlhttp://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-34-13-2295en
dc.language.isoen_USen
dc.publisherOptical Society of Americaen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.titleFiberoptic Temperature Sensors Based on Differential Spectral Transmittance Reflectivity And Multiplexed Sensing Systemsen
dc.title.serialApplied Opticsen
dc.typeArticle - Refereeden
dc.type.dcmitypeTexten

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