Simple Model of Optical Amplifier Chains to Evaluate Penalties in WDM Systems
Journal of Lightwave Technology, Vol. 16, Issue 9, pp. 1570- (1998)
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Abstract
A simple model to evaluate the penalty due to amplifier gainshape in a wavelength division multiplexing (WDM) optical system is proposed. The model requires only knowledge of the overall gain of the amplifier chain for all channels and provides signal-to-noise ratio (SNR) penalties for given launched powers. It also provides the input power distribution required for SNR equalization, and the associated SNR penalty, by solving an eigenvalue/eigenvector problem. The penalty predicted by the model agrees well with recent field measurements on a transoceanic cable. The model can also be applied to predict the gainshape of the amplifier chain from a measurement of the output noise spectrum with no input signal. The capacity of a long amplifier chain can thereby be determined from the receiving terminal only.
[IEEE ]
Citation
Fabrizio Forghieri, R. W. Tkach, and D. L. Favin, "Simple Model of Optical Amplifier Chains to Evaluate Penalties in WDM Systems," J. Lightwave Technol. 16, 1570- (1998)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-16-9-1570
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