Patent ID: 7146102

Claim:
An optical cross-connect device accommodating a plurality of sets of duplicated input transmission lines and a plurality of sets of duplicated output transmission lines, comprising: a first main switch; a second main switch; a plurality of input circuits provided for corresponding duplicated input transmission line; and a plurality of output circuits provided for corresponding duplicated output transmission line, wherein each of said input circuits further comprising: a first demultiplexer for demultiplexing WDM light received from a first input transmission line in a corresponding duplicated input transmission line for each wavelength; a second demultiplexer for demultiplexing WDM light received from a second input transmission line in the corresponding duplicated input transmission line for each wavelength; a plurality of first selectors, provided for each input wavelength, each of said plurality of first selectors selecting either an optical signal from said first demultiplexer or an optical signal from said second demultiplexer; and a plurality of optical first splitters, each of said plurality of optical first splitters splitting an optical signal selected by corresponding first selectors and guiding the split signals to said first main switch and said second main switch, respectively, and wherein each of said output circuits further comprising: a plurality of second selectors, each of said plurality of second selectors selecting either an optical signal from said first main switch or an optical signal from said second main switch; a plurality of regenerators, each of said plurality of regenerators regenerating an optical signal with a respective output wavelength based on an optical signal selected by corresponding second selector; a first multiplexer for multiplexing a plurality of optical signals and guiding the multiplexed signal to a first output transmission line in a corresponding duplicated output transmission line; a second multiplexer for multiplexing a plurality of optical signals and guiding the multiplexed signal to a second output transmission line in the corresponding duplicated output transmission line; and a plurality of second splitters, each of said plurality of second splitters splitting an optical signal regenerated by corresponding regenerator and guiding the split signals to said first multiplexer and said second multiplexer, respectively.