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dc.date.accessioned2016-08-24T17:53:59Zen
dc.date.available2016-08-24T17:53:59Zen
dc.date.issued1998-09-15en
dc.identifier.urihttp://hdl.handle.net/10919/72366en
dc.description.abstractUniformity of optical coupling of optical elements such as couplers and splitters is improved by heat treatment which causes dopants in the core of an optical fiber to diffuse into material from the cladding layer of the optical fibers from which the optical element is formed, resulting in a substantially homogeneous interior region of the star coupler or splitter. Increased lossiness of the optical element thus formed may be limited by termination of the heat treatment before dopant diffusion reaches equilibrium throughout the fibers so that a portion of the cladding layer of the fibers remains surrounding the substantially homogeneous region where the fibers have been fused together. Dopant diffusion is constrained to a substantially radial direction in each fiber by uniformity of heating over a region where at least two fibers are twisted together. Thus dopant diffusion is highly repeatable and can be readily regulated to provide highly selective, wavelength-dependent coupling between fibers, particularly for multiplexing and demultiplexing applications.en
dc.format.mimetypeapplication/pdfen
dc.language.isoen_USen
dc.publisherUnited States Patent and Trademark Officeen
dc.titleControlled dopant diffusion for fiber optic coupleren
dc.typePatenten
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/89/091/058/0.pdfen
dc.date.accessed2016-08-19en
dc.type.dcmitypeTexten
dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.en
dc.contributor.inventorMurphy, Kent A.en
dc.contributor.inventorClaus, Richard O.en
dc.contributor.inventorGunther, Michael F.en
dc.contributor.inventorPlante, Angela J.en
dc.contributor.inventorVuppala, Veerendra B.en
dc.contributor.inventorSen, Mallika B.en
dc.contributor.inventorVelayudhan, Nirmalen
dc.date.filed1995-09-05en
dc.identifier.applicationnumber8523596en
dc.subject.uspc385/43en
dc.subject.uspcother385/96en
dc.subject.uspcother385/123en
dc.subject.uspcother65/410en
dc.subject.cpcG02B6/2835en
dc.subject.cpcG02B6/2856en
dc.type.patenttypeutilityen
dc.identifier.patentnumber5809189en


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