Optical waveguides – With optical coupler – Particular coupling structure
Patent
1996-04-17
1998-05-19
Bovernick, Rodney B.
Optical waveguides
With optical coupler
Particular coupling structure
65409, 65412, G02B 626, G02B 642
Patent
active
057547203
ABSTRACT:
A method of making 1.times.2 or 2.times.2 overclad couplers, switches and the like such that the process is more reproducible and loss characteristics are improved. Such couplers are typically made by inserting the stripped portions of two active optical fibers into a tube, heating the tube midregion to collapse it onto the fibers and stretching the central portion of the collapsed midregion to achieve the desired coupling characteristics. The improvement involves the insertion of one or two spacer fibers into the tube bore along with the active fibers to take up empty space that had been present in tube bore and to prevent an active fiber from sagging and crossing over the other fiber when the tube is heated during the tube collapse step.
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Quinn Richard A.
Robson Christopher D.
Swaroop Latha I.
Weidman David L.
Bovernick Rodney B.
Corning Incorporated
Simmons William J.
Wise Robert E.
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