Patent ID: 6333800
Filing Date: 2001-12-25
Classification: H04J,H04Q

Abstract:
An optical wavelength selector provided with:an optical splitter that, when WDM optical signal in which k.sub.0.times.k.sub.1.times. . . . .times.k.sub.i.times. . . . .times.k.sub.p (where k.sub.0 . . . k.sub.p are each any natural number) WDM channels are multiplexed is inputted from one input port, splits said WDM optical signal into k.sub.0 beams and outputs the result;k.sub.0 optical gate switches that either let pass or cut off the k.sub.0 beams of said WDM optical signal inputted from said optical splitter;optical wavelength routers in p stages (where p is any natural number) that separate WDM optical signal inputted from one of k.sub.i-1 input ports into k.sub.i beams, one beam for each prescribed WDM channel group, and output the result;k.sub.i optical gate switches in p stages that either let pass or cut off inputted WDM optical signal; andan optical combiner that outputs from one output port one WDM channel inputted from one of k.sub.p optical gate switches of the pth stage of said optical gate switches;wherein each of said k.sub.0, k.sub.1, . . . k.sub.i, . . . k.sub.p is any of two, three, and four.