Patent ID: 9031404
Filing Date: 2015-05-12
Classification: H04B,H04J

Abstract:
1. A method of monitoring a WDM optical signal, comprising: receiving a WDM optical signal having a plurality of channels; detecting the optical signal after filtering the WDM optical signal with a tunable filter to determine a channel plan of the WDM optical signal; based on the channel plan that has been determined by detecting the WDM optical signal, reconfiguring at least a center wavelength and bandwidth of the tunable filter optical transfer function to determine a signal performance parameter of the WDM optical signal; filtering the optical signal with a tunable filter configured to have at least a first optical transfer function, wherein the first optical transfer function has a width narrower than a bandwidth of each of the optical channels; detecting the filtered optical signal to determine a second optical transfer function optimized to measure a parameter of a channel in the WDM optical signal; filtering the optical signal with the tunable filter configured to have the second optical transfer function; and while the optical signal is being filtered by the tunable filter configured with the second optical transfer function, detecting the optical signal to determine a signal performance parameter of the WDM optical signal.