Patent ID: 7079769
Filing Date: 2006-07-18
Classification: G02B,H04B

Abstract:
1. A dispersion-compensating system for a signal wavelength band of 1520 nm to 1620 nm, said system comprising: a first common transmission line through which light in said signal wavelength band propagates; first and second branched transmission lines branching off from said first common transmission line; a demultiplexer, provided between said first common transmission line and said first and second branched transmission lines, for demultiplexing light in said signal wavelength band propagating through said first common transmission line into first and second wavelength bands, and outputting light in said first wavelength band into said first branched transmission line and light in said second wavelength band into said second branched transmission line; a first dispersion-compensating device, provided on said first common transmission line, collectively compensating for a dispersion in said first and second wavelength bands without wavelength demultiplexing; and a second dispersion-compensating device, provided on said second branched transmission line, compensating for a dispersion in said second wave-length band, wherein said first dispersion-compensating device compensates for the dispersion in said first wavelength band so as to yield a dispersion deviation of +0.5 ps/nm/km or less, and said first and second dispersion-compensating devices compensate for the dispersion in said second wavelength band so as to yield a dispersion deviation of +0.5 ps/nm/km or less.