Reconfigurable optical add/drop multiplexer with buried...

Details Reconfigurable optical add/drop multiplexer with buried... Reconfigurable optical add/drop multiplexer with buried...

H - Electricity

04

J

H04J 14/02 (2006.01) H04B 10/18 (2006.01)

Patent

CA 2444078

Apparatuses and methods are provided for chromatic dispersion compensation of wavelength division multiplexed (WDM) optical signals within an optical add/drop multiplexer (OADM) and especially within a remotely reconfigurable add/drop multiplexer (RROADM). The arrangement is especially useful in metro or regional networks where RROADMs can be dynamically reconfigured to deliver signals from any node to any other node. A dispersion compensation module (DCM) is located in the multiplexed through path of the RROADM between the drop module and the add module such that only wavelengths passing through the RROADM are compensated and shorter optical paths traversing only one span between adjacent nodes are not compensated. This allows lower cost static DCMs to be used, allows more flexibility in DCM values and allows fewer DCMs to be used while maintaining dispersion limits.

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