Optical wavelength multiplexer/demultiplexer

Details Optical wavelength multiplexer/demultiplexer Optical wavelength multiplexer/demultiplexer

1997-02-28

1998-11-24

Ngo, John

Optical waveguides

With optical coupler

Input/output coupler

385 14, 385 46, 385 43, G02B 626

Patent

active

058419195

ABSTRACT:
An optical wavelength multiplexer/demultiplexer has an input channel waveguide for receiving a wavelength division multiplexed signal, a first slab waveguide having an input boundary and a fan-shaped output boundary, an arrayed-waveguide grating comprising N channel waveguides, which provides a predetermined waveguide length difference from each other, a second slab waveguide having a fan-shaped input boundary and an output boundary, N output channel waveguides for each receiving a demultiplexed optical signals having a desired wavelength .lambda.1, .lambda.2, . . . or .lambda.n. The channel waveguides of the arrayed-waveguide grating are arranged along the fan-shaped output boundary of the first slab waveguide such that an angle .theta. between the central axis of "i"th (i=1, 2, . . . N) channel waveguide and the symmetric axis of the fan-shaped output boundary of the first slab waveguide 4 satisfies the certain equations.

REFERENCES:
patent: 4904042 (1990-02-01), Dragone
patent: 5136671 (1992-08-01), Dragone
patent: 5243672 (1993-09-01), Dragone
patent: 5339157 (1994-08-01), Glance et al.
patent: 5467418 (1995-11-01), Dragone
patent: 5625723 (1997-04-01), Dragone et al.

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