Method of WDM channel tagging and monitoring, and apparatus

Details Method of WDM channel tagging and monitoring, and apparatus Method of WDM channel tagging and monitoring, and apparatus

2011-06-07

2011-06-07

Li, Shi K (Department: 2613)

Optical communications

Diagnostic testing

Determination of communication parameter

C398S208000

Reexamination Certificate

active

07957641

ABSTRACT:
Provided is an optical apparatus and method wherein power transfer coefficients arising from SRS are measured at a designated co-location point and the power of dithers, which are impressed on the channels of a multiplexed optical signal propagating through the optical apparatus, is measured at each co-location point. Within the optical apparatus distances between co-location points are short and the power transfer coefficients are effectively constant. Consequently, the power of each channel of the multiplexed optical signal at the co-location points is obtained from the power of the dithers at a respective one of the co-location points and the power transfer coefficients measured at the designated co-location point. In some embodiments, information on the channel power at the co-location points is used to provide instructions for compensating for fluctuations in channel power and/or channel count at an input and/or channel count within the optical apparatus.

REFERENCES:
patent: 5513029 (1996-04-01), Roberts
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Saeid Seydnejad, James Harley, and Frederic Simard, “Estimation of the SRS crosstalk on pilot-tones in WDM systems using a dither transfer matrix”, Proc. OFC2001, vol. 3, pp. WDD37-1-WDD37-4, Mar. 2001.
S. Seydnejad, F. Simard, J. Harley, “Higher Order Effects in SRS Pilot-Tones Interaction”, Optical Amplifiers and Their Applications Conference (OAA2001), Stress, Italy, Jul. 2001, Optical Society of America (OSA), OtuE17-1 to OtuE17-3.

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