Patent ID: 9130692
Filing Date: 2015-09-08
Classification: H04J

Abstract:
1. A system for routing C-band and L-band optical signals, comprising: (a) a C-band subsystem comprising one or more reconfigurable optical add/drop multiplexer (ROADM) modules arranged to select one or more C-band optical signals from a plurality of optical wavelength division multiplexed (WDM) signals received by the C-band subsystem, the C-band subsystem further comprising: (b) an L-band subsystem comprising one or more ROADM modules arranged to select one or more L-band optical signals from a plurality of optical WDM signals received by the L-band subsystem, the L-band subsystem further comprising: (c) at least two amplifiers arranged to amplify signals outputted by at least one of the multiplexers; (d) a dispersion compensating unit interposed between an output of one of the at least two amplifiers and an input of another of the at least two amplifiers; (e) at least one communication path for forwarding signals selected by the C-band and L-band subsystems; and (f) a combiner arranged to combine the one or more C-band optical signals and the one or more L-band optical signals selected by the C-band and L-band subsystems.