Patent ID: 8655186
Filing Date: 2014-02-18
Classification: H04B

Abstract:
1. A reconfigurable wavelength selective dispersion compensation device RWSDCD for selective compensation of dispersion in optical channels having respective different wavelengths, the RWSDCD having an input line for inputting incoming optical channels, and an output line for outputting outgoing optical channels, the RWSDCD comprising: a controllable wavelength selective unit WSU having a plurality of local, wavelength related input/output (I/O) ports; the WSU being adapted to controllably configure assignment of the incoming optical channels to the local I/O ports of said plurality in a way that any number of said incoming optical channels may at a time utilize any of said local I/O ports; a dispersion compensation cascade comprising at least one chain of successively connected dispersion compensation units DCUs, wherein one or more of the DCUs in the chain are respectively connectable to one or more of said local I/O ports; the arrangement of the RWSDCD being such that the output line outputs from the RWSDCD said outgoing optical channels comprising one or more of said incoming optical channels upon selectively compensating chromatic dispersion in them by controllably passing said one or more of the incoming optical channels via one or more DCUs of said dispersion compensation cascade, wherein said at least one chain comprises a first DCU and a last DCU each having at least two connections, and comprising at least one intermediate DCU having at least three connections; and wherein said at least one chain is interconnected with said WSU in such a manner that said at least one intermediate DCU, via two of said at least three connections, is respectively connected with a preceding DCU in the chain and with a next DCU in the chain, and via a third of said at least three connections is connected to one of the local I/O ports of the WSU.