Low loss coupler

Details Low loss coupler Low loss coupler

1993-06-09

1994-08-16

Ullah, Akm E.

Optical waveguides

With optical coupler

Particular coupling function

65411, 65412, G02B 628, C03C 2502

Patent

active

053393724

ABSTRACT:
A low loss fiber optic coupler of the type wherein a plurality of single-mode optical fibers are fused together along a portion of the lengths thereof to form a coupling region. Each fiber includes a core and a cladding, the lowest refractive index of the fiber claddings being n.sub.2. Each of the output fibers of the coupler further includes a surface region of refractive index n.sub.4 that inhibits the coupling of light to lossy composite modes, n.sub.4 being lower than n.sub.2.

REFERENCES:
patent: 4799949 (1989-01-01), Keck et al.
patent: 4842359 (1989-06-01), Imoto et al.
patent: 5017206 (1991-05-01), Miller et al.

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