Multi-neckdown fiber optic coupler

Details Multi-neckdown fiber optic coupler Multi-neckdown fiber optic coupler

1995-11-30

1997-09-02

Palmer, Phan T. H.

Optical waveguides

With optical coupler

Particular coupling structure

385 43, 385 50, G02B 626

Patent

active

056640374

ABSTRACT:
A unitary fiber optic coupling device in which N fibers (N.gtoreq.3) extend in a parallel array having two coupling regions of reduced cross-sectional area. At least one of the fibers is formed of two sections that are situated end-to-end, an active core-containing fiber section that is situated in the first coupling region and a dummy fiber section that is situated in the second coupling region. The coupler also contains at least second and third fibers that are active core-containing fibers throughout their lengths. The second and third fibers couple to one another in the first coupling region but remain uncoupled to one another in the second coupling region. This configuration enables a unitary coupling device to posess multifunction capability. Two fibers that couple in the first coupling region do not couple in the second coupling region, thus avoiding resonance effects.

REFERENCES:
patent: 5268979 (1993-12-01), Weidman
patent: 5295205 (1994-03-01), Miller et al.

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