Optical communication system having dynamic gain equalization

Details Optical communication system having dynamic gain equalization Optical communication system having dynamic gain equalization

2007-10-09

2007-10-09

Singh, Dalzid (Department: 2613)

Optical communications

Multiplex

Wavelength division or frequency division

C398S038000, C398S158000, C398S160000

Reexamination Certificate

active

10395488

ABSTRACT:
An optical communication device, and related method, are provided for providing a tailored, spectrally non-uniform gain over a broad spectrum. In particular, the optical communication device includes an optical amplifier having a dynamic gain equalization (DGE) circuit that adjusts the gain spectrum of the optical amplifier to provide uniform gain, at a desired level, within individual channel bands in accordance with the data rates of channels in those bands. Accordingly, the overall spectrum has a “stepped” profile with higher gain values for high data rate channels and lower gain values for lower rate channels. As a result, a WDM system can accommodate multiple data rate signals by providing spectrally uniform high gain for high data rate channels, and low gain for lower rate channels. Improved signal quality can thus be achieved for both high speed and low speed signals in a single WDM system.

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A. R. Pratt et al., Marconi, Coventry, UK: “5,745 km DWDM transcontinental field trial using 10 Gbit/s dispersion managed solitons and dynamic gain equalization,” pp. PD26-1 to PD26-3.
Heather Patrick, Optinel Systems, Inc. USA: “Gain and Power Equalization,” OFC 2003, Tuesday Afternoon, vol. 1, p. 244.

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