Optical communications – Diagnostic testing – Determination of communication parameter
Reexamination Certificate
2005-02-22
2005-02-22
Pascal, Leslie (Department: 2633)
Optical communications
Diagnostic testing
Determination of communication parameter
C398S094000, C398S197000, C398S193000
Reexamination Certificate
active
06859622
ABSTRACT:
The performance of a WDM system is improved by adjusting launch powers of each channel responsive to a prediction of system performance degradation. The prediction of system performance degradation could relate to the effect of Stimulated Raman Scattering (SRS) in which case, given launch power, a value representative of the effect of SRS is estimated for each channel in a WDM system using a method described herein. Using this SRS effect estimate, a value is computed for the estimated output power of each channel. These estimated output power values are then used to refine the estimate of the SRS effect on each channel. Subsequently, the refined SRS effect estimates are used to refine the estimated output power values. These steps are repeated and eventually an estimate of SRS effect on each wavelength channel is settled upon that is as accurate as that which results from other, more computationally complex, methods.
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Harley James
Jiang Yuan
Seynejad Saeid
Nortel Networks Limited
Pascal Leslie
Singh Dalzid
LandOfFree
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