Accession Number : ADD006923

Title :   Index-Matched Fused-Cladding Single-Mode Bi-Directional Fiber Optic Access Coupler/Beamsplitter.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : McKnight,William H

Report Date : 07 Dec 1979

Pagination or Media Count : 10

Abstract : A beamsplitter/coupler allows single-mode energy transmission between a pair of optic fibers. Most of the fibers' claddings along predetermined lengths is removed by etching and the etched lengths are brought into close proximity to allow an evanescent field energy transfer. The two fibers are enclosed by a pair of plates or a tube of material having an identical index of refraction as the cladding. After tube or plates are fused with the fibers under controlled conditions, the beamsplitter/coupler offers exact refractive index matching for all time and at all temperatures, pressures and wavelengths. This manner of fabrication should provide for the lowest possible insertion loss, superb long-term optical and mechanical stability, and neither enhances, aides, nor creates higher mode of energy propagation. (Author)

Descriptors :   *Patent applications, *Fiber optics, *Couplings, *Beam splitting, *Cladding, Optical properties, Propagation, Stability, Control, Energy transfer, Etching, Mechanical properties, Insertion loss, Inventions

Subject Categories : Fiber Optics and Integrated Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE