Optical wavelength multiplexer/demultiplexer

Details Optical wavelength multiplexer/demultiplexer Optical wavelength multiplexer/demultiplexer

1998-06-03

2000-05-30

Spyrou, Cassandra

Optical waveguides

With optical coupler

Particular coupling structure

385 24, 385 39, 385 37, 385 31, 385 50, 359124, 359115, H04J 1402

Patent

active

060699906

ABSTRACT:
An optical wavelength multiplexer/demultiplexer, comprising: a substrate: and, provided thereon, input waveguides, output waveguides, an array waveguide diffraction grating comprising a plurality of waveguides with a predetermined difference in length being provided between the waveguides, an input slab waveguide for connecting the input waveguides to the array waveguide diffraction grating, an output slab waveguide for connecting the output waveguides to the array waveguide diffraction grating, and multimode waveguides, for example, tapered waveguides and parabolic waveguides, provided in a connecting section between the input waveguides and the input slab waveguide. The output slab waveguide may have a smaller radius than the input slab waveguide to narrow the width of the electric field distribution on the output side. The above construction can bring wavelength characteristics to a rectangular form to broaden the transmission band and at the same time can reduce the loss.

REFERENCES:
patent: 5706377 (1998-01-01), Li
patent: 5926298 (1999-07-01), Li
patent: 5982960 (1999-11-01), Akiba
"Flat Spectral Response Arrayed-Waveguide Grating Mulitplexer with Parabolic Waveguide Horns", K. Okamoto et al., Electronics Letters, vol. 32 No. 18, pp. 1661-1662.

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