Optical waveguide y junction

Details Optical waveguide y junction Optical waveguide y junction

G - Physics

02

B

G02B 6/125 (2006.01) G02B 6/12 (2006.01) G02B 6/132 (2006.01) G02B 6/134 (2006.01) G02B 27/10 (2006.01)

Patent

CA 2347658

In an optical waveguide Y junction, comprising an input waveguide path, a split portion having one end smoothly connected to an end of said input waveguide path, and a pair of bifurcated ends, and a pair of output waveguide paths each paving an end smoothly connected to a corresponding one of said bifurcated ends of said split portion, the split portion defines a modified asymmetric Y-shaped waveguide path which is defined by modifying an original symmetric Y-shaped waveguide path having a substantially constant width by removing an asymmetric wedge-shaped section from a side of the split portion interposed between the output waveguide paths. Thus, simply by changing the inner profile of the split portion, a desired uneven split ratio can be achieved without providing a spread out split portion or requiring any abrupt change in the shape of the waveguide path. This contributes to the reduction in the loss of the signal light. Also, a desired split ratio can be readily achieved by suitably changing the dimensions of the wedge-shaped section. In particular, by selecting a wedge- shaped inner profile, the design and fabrication of the junction can be simplified.

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