Arrayed waveguide grating circuit

Optical waveguides – Integrated optical circuit

Reexamination Certificate

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Reexamination Certificate

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07995876

ABSTRACT:
Two AWG circuits are integrated while preventing degradation in quality of a multiplexing/demultiplexing function. An arrayed waveguide grating circuit includes: a first slab waveguide (52) connected to a first input waveguide (51a) and second output waveguides (55b); a second slab waveguide (54) connected to first output waveguides (55a) and a second input waveguide (51b); and an array waveguide (53) connecting the first slab waveguide (52) and the second slab waveguide (54), wherein the input waveguides (51a,51b) are connected to the slab waveguides (52, 54) at an interval of 1.5× from the outermost second output waveguide out of the second output waveguides (55a,55b) connected at an interval x depending on a wavelength.

REFERENCES:
patent: 6434292 (2002-08-01), Kim et al.
patent: 2003/0007728 (2003-01-01), Uetsuka et al.
patent: 2003/0095737 (2003-05-01), Welch et al.
patent: 2007/0086702 (2007-04-01), Peters et al.
patent: 2001-166162 (2001-06-01), None
patent: 3441437 (2003-09-01), None
International Preliminary Report on Patentability date Jul. 3, 2008 for the related PCT Application No. PCT/JP2006/325528 (translated English copy).

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