Optical waveguides – With optical coupler – Input/output coupler
Reexamination Certificate
2005-01-18
2005-01-18
Epps, Georgia (Department: 2873)
Optical waveguides
With optical coupler
Input/output coupler
C385S024000, C385S033000, C398S049000, C398S083000
Reexamination Certificate
active
06845195
ABSTRACT:
A dispersive optical element and positionable micromirrors are deployed to implement a configurable wavelength routing device for add/drop and other applications. Input light is dispersed and imaged onto a focal plane where there is disposed an array of light redirection elements operative to decenter wavelengths on a selective basis. In the preferred embodiment, the dispersive optical element is a grating or grating/prism featuring a high degree of dispersion allowing the input and return paths to be parallel and counter-propagating, both for a compact size and to facilitate a lateral shifting in a localized area. The inputs and outputs may be implemented in conjunction with optical fibers, with a lens being used to collimate light prior to illumination of the grating. A focusing lens is preferably used to form a nominally telecentric image of the dispersed spectrum at the image plane. A control mechanism is provided to locate individual mirrors of the array in one of at least two positions, to effectuate the selective wavelength routing. In the preferred embodiment, the mirrors are 90 degree V-mirrors, translatable within the plane of the telecentric image, such that in one position, a common port is coupled to an express port and whereas, in another position, a common port is placed in communication with an add/drop port.
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Dinh Jack
Epps Georgia
Gifford Krass Groh Sprinkle Anderson & Citkowski PC
Kaiser Optical Systems
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