Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2006-01-10
2006-01-10
Ullah, Akm Enayet (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling structure
C398S118000
Reexamination Certificate
active
06985657
ABSTRACT:
For a WDM optical communication, on a substrate of an arrayed waveguide type wavelength multiplexing/demultiplexing device, input waveguide propagates a plurality of light and outputs WDM light; a first slab diffuses the WDM light outputted from the input waveguide; a channel waveguide array separates the WDM light and causes the separated six lights to propagate; a second slab condenses the separated six lights having propagated through the channel waveguide array; output waveguides causes the separated six lights condensed to propagate, and a waveguide interval in first neighborhoods connected to the first slab is set to become wider than a first waveguide interval in a first connection section for connecting the channel waveguide array to the first slab, which achieves a reduced chip size, cost-reduction of chips, and reduces loss.
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