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    • Controlled dopant diffusion for fiber optic coupler 

      Virginia Tech Intellectual Properties, Inc.; Murphy, Kent A.; Claus, Richard O.; Gunther, Michael F.; Plante, Angela J.; Vuppala, Veerendra B.; Sen, Mallika B.; Velayudhan, Nirmal (United States Patent and Trademark Office, 1998-09-15)
      Uniformity 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 ...