Method of making a single-mode evanescent-wave coupler having re

Details Method of making a single-mode evanescent-wave coupler having re Method of making a single-mode evanescent-wave coupler having re

1986-10-15

1989-01-17

Wan, Gene

350 9629, G02B 642

Patent

active

047984384

ABSTRACT:
A method of making a single-mode evanescent-wave coupler having reduced wavelength dependence includes the steps of (a) providing first and second single-mode optical fibers having substantially identical propagation constants; (b) heating the first optical fiber along a first longitudinal segment thereof while stretching the first optical fiber to reduce the diameter of the first longitudinal segment, the reduced diameter being substantially uniform along the first longitudinal segment; (c) maintaining the first and second optical fibers in parallel juxtaposition with one another along a portion of the first longitudinal segment; and (d) fusing together the portions of the first and second optical fibers maintained in parallel juxtaposition to form a coupling region.

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