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Minimizing Bandwidth Narrowing Penalties in a Wavelength Selective Switch Optical Network

  • US 20120195592A1
  • Filed: 02/01/2011
  • Published: 08/02/2012
  • Est. Priority Date: 02/01/2011
  • Status: Active Grant
First Claim
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1. A method for provisioning a channel on which a client signal will be transmitted along a path from a source node through at least one intermediate node before reaching a destination node of a WDM optical network, the method comprising the following steps:

  • (a) selecting a signal channel and a path on which the client signal will be transmitted among a plurality of nodes of the network;

    (b) configuring an optical filter at each node along the path to reflect the state of the signal channel at that node;

    (c) determining, with respect to each node along the path, whether each of two channels adjacent to the signal channel is unused; and

    (d) configuring the optical filter at each node along the path by setting the state of each unused adjacent channel to the same physical state as that of the signal channel,(e) thereby effectively increasing the spectral passband of the client signal.

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