Fiber optic coupling

Details Fiber optic coupling Fiber optic coupling

1993-12-17

1995-04-18

Gonzalez, Frank

Optical waveguides

With optical coupler

Particular coupling structure

385 42, 385 46, 385 51, 65406, G02B 628

Patent

active

054085543

ABSTRACT:
In one aspect, the invention concerns fused fiber optic couplers of the type formed from fibers of transparent substance each having a circular cross-section of preselected diameter. The fibers include a central fiber and at least one ring of closely packed surrounding fibers with at least some of the fibers being optical fibers that have a core and a surrounding cladding. The coupler is formed by the processes of providing the fibers, assembling them in a close-packed relationship, and heating and drawing the assembly of fibers in the close-packed region.
We have discovered that the steps involved in forming such a coupler, introduce slight size variations that can seriously affect the performance of the coupler, and that these slight variations can be accommodated by slight, controlled, under-sizing of one or more of the surrounding fibers or over-sizing of the central fiber.

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