Patent ID: 6810169
Filing Date: 2004-10-26
Classification: G02B

Abstract:
An optical device comprising:a first port for launching an input beam of light including a plurality of wavelength channels; a second port for receiving at least a portion of one of the plurality of wavelength channels; first redirecting means for receiving the input beam of light, the first redirecting means having optical power; a dispersive element for receiving the input beam of light from the first redirecting means, and for dispersing the input beam of light into the plurality of wavelength channels along a first series of paths; second redirecting means for receiving the dispersed wavelength channels, the second redirecting means having optical power; and a plurality of modifying means, each modifying means for receiving one of the dispersed wavelength channels along one of the first series of paths, and for reflecting at least a portion each wavelength channel back along one of the first series of paths or back along one of a second series of paths; wherein each of said modifying means includes a first adjustable phase biasing means positioned in each of the first series of paths, and a second adjustable phase biasing means positioned in each of the second series of paths; wherein wavelength channels traveling back along one of the first series of paths exit the first port via the second redirecting means, the dispersive element and the first redirecting means; and wherein wavelength channels traveling back along one of the second series of paths exit the second port via the second redirecting means, the dispersive element and the first redirecting means.