Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Patent
1993-12-21
1994-12-13
Lee, John D.
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
385145, 385141, 428375, 428392, 65410, 65432, G02B 622
Patent
active
053735781
ABSTRACT:
A coating system for individual glass fibers of a lightwave communications system has improved strippability, particularly in situations where a group of such fibers are arrayed together in what is known as a ribbon. A preferred embodiment includes two layers (primary and secondary) of polymeric materials surrounding the glass fiber. The primary layer comprises an oligomer (50-80% by weight), a diluent (15-40% by weight), and additives (5-35% by weight). The oligomer comprises polyol "A," diisocyanate "B," and a hydroxy-terminated alkyl acrylate "C" having the structure C-B-A-B-C. At least one of the additives contains a non-crosslinked hydrocarbon component (1-20% by weight) having a structure R.sub.1 --(R).sub.n --R.sub.2 ; where R.sub.1, R.sub.2 comprises an alkyl group or an OH group, and R is a combination of C, H or C, H, O. In an alternative embodiment, the need for a diluent is substantially eliminated by using an oligomer having the structure E-D-E where "D" represents a carboxy-terminated polyol, and "E" represents a glycidyl acrylate.
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Parker Theodore L.
Petisce James R.
Shepherd Lloyd
Taylor Carl R.
AT&T Corp.
Heartney Phan Thi
Lee John D.
Morra Michael A.
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