Optical waveguides – With optical coupler – Particular coupling function
Patent
1997-05-28
1999-03-30
Healy, Brian
Optical waveguides
With optical coupler
Particular coupling function
385 24, 385 27, 385 39, 385 42, 385 46, 359115, 359116, 359124, 359127, G02B 626, H04J 1400
Patent
active
058899065
ABSTRACT:
A signal router includes a free space region with input and output sides. A number of input and output waveguide arms extend from the respective input and output sides of the free space region. At least a subset of the input or output waveguide arms are configured such that a signal applied to one of the waveguide arms excites multiple modes of that waveguide arm. Coupling between the multiple modes of the various waveguide arms is used to shape a multi-channel output radiation pattern of the router. The excitation of multiple modes may be provided by configuring a given waveguide arm to include a first portion and a second portion, with the second portion arranged between the first portion and a side of the free space region and having a width which is greater than a width of the first portion. Alternatively, the excitation of multiple modes may be provided by including one or more auxiliary waveguide arms between a given pair of main input or output waveguide arms. In either case, a desired multi-channel radiation pattern for a given router may be provided by altering characteristics of the waveguide arms.
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Healy Brian
Lucent Technologies - Inc.
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