Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-11-01
2005-11-01
Palmer, Phan T. H. (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S003000, C385S010000, C385S014000
Reexamination Certificate
active
06961491
ABSTRACT:
An optical apparatus comprises an optical element having at least one set of diffractive elements and multiple channel optical waveguides. Diffractive elements of each set are distributed among diffractive element subsets corresponding to each of the multiple channel waveguides. Each diffractive element set routes, between a corresponding pair of optical ports, those corresponding portions of an optical signal propagating within the optical element that are received by multiple channel waveguides and back-diffracted within the receiving channel waveguides by corresponding diffractive element subsets. The channel optical waveguides are arranged so that optical signals propagate through regions of the optical element between the ports and the first ends of the channel waveguides. Relative spatial arrangement of the first ends of the channel waveguides and corresponding relative phase shifts imparted in the channel waveguides define at least in part a relative spatial arrangement of the corresponding pair of optical ports.
REFERENCES:
patent: 6823115 (2004-11-01), Greiner et al.
Greiner Christoph M.
Iazikov Dmitri
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