Optical waveguides – Optical fiber waveguide with cladding – Utilizing multiple core or cladding
Patent
1994-03-07
1995-12-05
Healy, Brian
Optical waveguides
Optical fiber waveguide with cladding
Utilizing multiple core or cladding
385100, 385102, 385123, 385127, 385141, 4271632, G02B 610, B05D 500
Patent
active
054737206
ABSTRACT:
Applicants have discovered that low pullout strength of optical fiber is attributable to volatile, unreacted monomers and impurities which result from the incomplete polymerization of liquid coating materials. They have further discovered that removing these unreacted liquids as by heating in air, heating in vacuum or by application of a solvent mixture improves fiber coating adhesion. By heating cured polymer-coated fiber in air at temperatures of 100.degree. C. or more, the fiber pullout strength is enhanced by 25% or more. This postcure heating can advantageously be clone off-line by placing loosely wound fiber in a heated oven. Alternatively, the postcure heating can be done on-line by reel-to-reel passage of the fiber through a heated furnace. Preferred temperatures are in the range 100.degree. C.-300.degree. C. Even greater enhancement of pullout strength can be effected by heating in vacuum or by solvent extraction.
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International Application WO91/03503 published under the Patent Cooperation Treaty on Mar. 21, 1991.
Ali Yussuf S.
Brownlow Darryl L.
Katz Howard E.
Kuck Valerie J.
Schilling Marcia L.
AT&T Corp.
Books Glen E.
Healy Brian
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