Index-Matched Fused-Cladding Single-Mode Bi-Directional Fiber Optic Access Coupler/Beamsplitter.
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)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 07, 1979
- Accession Number
- ADD006923
Entities
People
- William H. Mcknight
Organizations
- United States Department of the Navy