Patent ID: 7957641
Filing Date: 2011-06-07
Classification: H04B,H04J

Abstract:
1. A method of monitoring cross-talk, at a point in an optical system, arising at least in part from a non-linear process in a transmission medium utilized in the optical system in a multiplexed optical signal having a plurality of channels upon one or more of which has been impressed, at another point in the optical system, a unique dither, the method comprising: determining channel power of at least one channel of the plurality of channels; determining a fractional power of any dither present upon the at least one channel resulting at least in part from the non-linear process in the transmission medium; and determining a power transfer coefficient from the fractional power and the channel power of the at least one channel, the power transfer coefficient indicative of cross-talk occurring on the at least one channel from any of the plurality of channels upon which the unique dither has been impressed, the cross-talk due at least in part to the non-linear process in the transmission medium.