Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2007-03-20
2007-03-20
Wood, Kevin S. (Department: 2874)
Optical waveguides
With optical coupler
Input/output coupler
C385S024000, C385S031000
Reexamination Certificate
active
09609178
ABSTRACT:
A wavelength router to be used for fiber optical networking router is based on a diffraction grating which utilizes only N wavelengths to interconnect N inputs to N outputs. The basic approach is to augment the grating with additional couplers or wavelength selective elements so than N−1 of the 2N−1 outputs are combined with other N outputs (leaving only N outputs). One embodiment uses directional couplers as combiners. Another embodiment uses wavelength-selective couplers. Another embodiment uses a pair of diffraction gratings to maintain parallel propagation of all optical beams. Also, beam combining can be implemented either by using retroflection back through the grating pair or by using couplers.
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Bennett Cory V.
Bond Steven W.
Deri Robert J.
Patel Rajesh R.
Carnahan L. E.
Lee John H.
Staggs Michael C.
The Regents of the University of California
Wood Kevin S.
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