Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2006-05-30
2006-05-30
Healy, Brian M. (Department: 2883)
Optical waveguides
With optical coupler
Input/output coupler
C385S014000, C385S129000, C385S130000, C398S079000, C398S082000, C398S084000, C398S087000
Reexamination Certificate
active
07054526
ABSTRACT:
An optical multiplexer/demultiplexer uses a diffraction grating, capable of multiplexing/demultiplexing lights of narrow wavelength spacing at a short focal distance. To this end, a plurality of output waveguide groups is connected to one end face of a slab waveguide to which an input waveguide group is connected. A diffraction grating in which grating grooves, each including a plurality of reflection planes blazed corresponding to respective arrangement directions of the plurality of output waveguide groups are formed, is disposed on the other end face of the slab waveguide. The arrangements of the respective output waveguide groups are determined, so that diffracted lights of wavelengths different from each other, which are reflected by the reflection planes of the diffraction grating, respectively reach the output waveguides of the plurality of output waveguide groups.
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Fujitsu Limited
Healy Brian M.
Staas & Halsey , LLP
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