Y-branched optical waveguide and multi-stage optical power...

Details Y-branched optical waveguide and multi-stage optical power... Y-branched optical waveguide and multi-stage optical power...

2005-08-23

2005-08-23

Ullah, Akm Enayet (Department: 2874)

Optical waveguides

With optical coupler

Particular coupling structure

C385S043000

Reexamination Certificate

active

06934447

ABSTRACT:
A Y-branched optical waveguide with a uniform output characteristic for use in optical communication systems is disclosed. The optical waveguide, consisting of a core section serving as a transmission medium of an optical signal and a cladding section surrounding the core section, is formed on a semiconductor substrate. An input-tapered waveguide is configured to receive the optical signal through a first ending section and to output the optical signal through a second ending section, with a symmetrical structure with respect to a centered line of the input-tapered waveguide, so that a width of the input-tapered waveguide extends more widely along the centered line. A pair of first and second output-tapered waveguides each are configured to receive the optical signal branched through the second ending section, from which the pair of first and second output-tapered waveguides respectively extend downstream, with an asymmetrical structure with respect to the centered line, a respective width of the first and second output-tapered waveguides extending more widely along the centered line.

REFERENCES:
patent: 5586209 (1996-12-01), Matsuura et al.
Uetsuka et al., “Novel Asymmetric Y-Branches for Planar Lightwave Circuits”, 1996, OFC '96 Technical Digest, pp. 176-177.

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