Method for the manufacture of a multi-channel fiber optical waveguide
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United States of America Patent
Stats
-
Jul 7, 1981
Grant Date -
N/A
app pub date -
Feb 25, 1980
filing date -
Mar 9, 1979
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A method for forming a preform which is subsequently drawn into a multi-channel fiber optical wave guide having a plurality of wave guide cores embedded in a cladding material, characterized by providing a quartz glass tube having an inner surface covered by a layer of cladding material, which in turn is covered by a layer of core material, removing strips of the core material to form parallel, symmetrically disposed strip-like portions of the core material, and heating the tube to cause the collapsing of the tube into the preform with buckling in the areas free of the strip-like portions of core material so that heat of the strip-like portions of core material become completely surrounded by cladding material and then subsequently drawing the preform into the optical fiber.
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