Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-05-03
2005-05-03
Glick, Edward J. (Department: 2882)
Optical waveguides
With optical coupler
Input/output coupler
C385S046000, C385S024000, C398S084000
Reexamination Certificate
active
06888985
ABSTRACT:
An arrayed waveguide element having flat optical frequency characteristics, and an optical communication system using such arrayed waveguide element are realized by providing the arrayed waveguide element that is prepared by forming an inputting channel waveguide as well as an outputting channel waveguide, a channel waveguide array, a first sector form slab waveguide for connecting the inputting channel waveguide with the channel waveguide array, and a second sector form slab waveguide for connecting the outputting channel waveguide with the channel waveguide array on a substrate. A waveguide part wherein the outputting channel waveguide is connected with the second sector form slab waveguide is defined in a parabolic configuration, whereby flat optical frequency characteristics are realized. Furthermore, it is possible that an individual parabolic configuration is adjusted in response to a wavelength, so that it can cope with a trend of broad band in optical signals.
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The document has been considered, but will not be printed.
Glick Edward J.
NEC Corporation
Suchecki Krystyna
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