Optical Transmission System Including Dispersion Slope Compensation
AssigneeTyco Telecommunications (US) Inc.
InventorsJin-Xing Cai, Dmitri Foursa, Carl Davidson, Alexei Pilipetskii, Morten Nissov, Neal Bergano
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Abstract
A WDM optical transmission system and method uses slope compensation at the transmit terminal and/or the receive terminal. The system and method may be used with modulation formats with a short pulse width and a broad optical spectrum.
Claims20
A wavelength-division multiplexed optical communication system, comprising:
- a transmitter configured to provide a plurality of optical signals, each of said optical signals having associated data modulated thereon and having a pulse width less than about 40% of a bit time associated with said data;
- a receiver;
- an optical fiber transmission path coupling said transmitter to said receiver, said transmission path establishing a end-to-end dispersion slope across a range of wavelengths transmitted from said transmitter to said receiver;
- and
- at least one dispersion slope compensator configured to compensate for at least a portion of said end-to-end dispersion slope, said at least one dispersion slope compensator being positioned at said transmitter or said receiver.
A wavelength-division multiplexed optical communication system, comprising:
- a transmitter configured to provide a plurality of optical signals, each of said optical signals having associated data modulated thereon and having a pulse width less than about 40% of a bit time associated with said data;
- a receiver;
- an optical fiber transmission path coupling said transmitter to said receiver, said transmission path establishing a end-to-end dispersion slope across a range of wavelengths transmitted from said transmitter to said receiver;
- a plurality of said dispersion compensators disposed in said receiver, each of said dispersion compensators being coupled for receiving at least one associated band of wavelengths for compensating for said end-to-end dispersion slope established across said associated band of wavelengths;
- and
- at least one chromatic dispersion compensator configured to compensate for at least a portion of the magnitude of chromatic dispersion imparted to at least one of said optical signals by said transmission line.
A method of improving the performance of an existing wavelength-division multiplexed communication system including a transmitter for transmitting a plurality of optical signals having data modulated thereon with an existing pulse width to a receiver through an optical fiber transmission path, said optical fiber transmission path establishing an end-to-end dispersion slope across said optical signals, said method comprising:
- compensating for at least a portion of said end-to-end dispersion slope at said transmitter or said receiver;
- and
- reducing said existing pulse width.
Dependencies are inferred from the claim text.