Accession Number : ADD009162
Title : Generalized Coupler Realization for Use in Fiber Optic Systems.
Descriptive Note : Patent Application,
Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC
Personal Author(s) : Cowen,Steven J
Report Date : 21 Dec 1981
Pagination or Media Count : 16
Abstract : An apparatus permits the splitting of optical energy coming through a first optical port to at least a second optical port. A first quarter-pitch graded refractive index lense has an input surface disposed adjacent the first optical port for imaging at least a portion of the optical energy by having an image plane coinciding with the input surface. A second quarter-pitch graded refractive index lense had an output surface disposed adjacent the second optical port for imaging at least a portion of the optical energy by having an image plane coinciding with the output surface. A means is interposed between the first quarter-pitch graded refractive index lense and the second quarter-pitch graded refractive index lense for reflecting at least a portion of the optical energy to a third optical port located adjacent the input surface and next to the first optical port and for transmitting at least a portion of the optical energy to the second port. The reflecting and transmitting means is optionally a partially silvered layer interposed between the two quarter-pitch graded refractive index lenses to provide a selective reflectability and a desired tap-off ratio.
Descriptors : *Patent applications, *Beam splitting, *Fiber optics, *Waveguide couplers, Optical lenses, Pitch(Inclination), Beam steering, Ports(Openings), Refractive index, Optical coatings, Dichroism, Optical switching
Subject Categories : Fiber Optics and Integrated Optics
Distribution Statement : APPROVED FOR PUBLIC RELEASE