Optical waveguides – With optical coupler – Particular coupling structure
Reexamination Certificate
2005-03-29
2005-03-29
Sanghavi, Hemang (Department: 2874)
Optical waveguides
With optical coupler
Particular coupling structure
C385S024000, C385S037000, C385S043000
Reexamination Certificate
active
06873766
ABSTRACT:
An optical interconnection apparatus including waveguide arrays such as waveguide lenses, waveguide gratings and star couplers, has improved efficiency realized by using a periodic array including in each period a combination of two radial waveguides. The array is formed with angular period α between an input circle and an output circle and it includes an input section, connected to the input circle, and an output section connected to the output circle. The input section includes a single waveguide in each period and it is efficiently coupled with minimal loss to the output section, whose waveguides are approximately arranged with period α/2 in the final region close to the output circle.
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Mathews, Collins, Shephard & McKay, P.A.
Sanghavi Hemang
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