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