Optical data transmission system using sub-band multiplexing

Details Optical data transmission system using sub-band multiplexing Optical data transmission system using sub-band multiplexing

2008-05-20

2008-05-20

Tran, Dzung (Department: 2613)

Optical communications

Transmitter

Having particular modulation

C398S187000, C398S188000

Reexamination Certificate

active

07376356

ABSTRACT:
In accordance with the invention, an optical data transmission system of enhanced flexibility is provided by sub-band multiplexing of a WDM channel. Specifically, an exemplary optical data transmission system comprises an optical source for generating a plurality of frequency spaced optical tones within at least one WDM channel, a plurality of modulators for modulating the tones, and an optical transmission fiber for receiving and transmitting the modulated tones. An advantage of this system is that the tones are coherent. As a consequence, the need for guard bands is substantially reduced, and more flexible coding systems can be used to achieve a higher level of integration. For example, both amplitude and phase coding can be applied to the sub-band signals.

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Betti, S. et al.: “Multilevel Coherent Optical System Based on Stokes Parameters Modulation,” Journal of Lightwave Technology, vol. 8, No. 7, Jul. 1990.

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