Method of making a single-mode evanescent-wave coupler...

Details Method of making a single-mode evanescent-wave coupler... Method of making a single-mode evanescent-wave coupler...

G - Physics

02

B

26/197, 49/82

G02B 6/42 (2006.01) G02B 6/28 (2006.01) G02B 6/34 (2006.01)

Patent

CA 1277126

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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