Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-04-19
2005-04-19
Lee, John D. (Department: 2883)
Optical waveguides
With optical coupler
Input/output coupler
C385S037000, C398S086000, C398S087000
Reexamination Certificate
active
06882775
ABSTRACT:
An optical multiplexing/demultiplexing apparatus includes: an optical fiber; a collimator optically coupled to the optical fiber; at least one anamorphic pair of prisms optically coupled to the collimator at a side opposite to the optical fiber; a diffraction grating optically coupled to the at least one anamorphic pair of prisms at a side opposite to the collimator; a focusing lens optically coupled to the at least one anamorphic pair of prisms; and a plurality of optical devices optically coupled to the focusing lens at a side opposite to the at least one anamorphic pair of prisms. The at least one anamorphic pair of prisms permits the beam incident upon the diffraction grating to be relatively narrow in a dimension perpendicular to the dispersive direction of the grating so that the grating can produce high spectral resolution while preserving compact system size and simplicity.
REFERENCES:
patent: 6339504 (2002-01-01), Oliva
patent: 6441934 (2002-08-01), Boord et al.
patent: 6728488 (2004-04-01), Peng et al.
patent: 20020159112 (2002-10-01), Coppeta et al.
patent: 20030002038 (2003-01-01), Mawatari
Avanex Corporation
Lee John D.
Moser, Patterson & Sheridan L.L.P.
Wong Eric
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