Optical communications – Transmitter and receiver system – Including optical waveguide
Reexamination Certificate
2006-10-03
2006-10-03
Pascal, Leslie (Department: 2613)
Optical communications
Transmitter and receiver system
Including optical waveguide
C398S159000, C398S167000
Reexamination Certificate
active
07116913
ABSTRACT:
In an optical transmission system comprising a transmitter, a receiver, and a transmission line that connects the transmitter and the receiver, a dispersion compensator is disposed in the receiver. The transmitter comprises an E/O (electro-optical signal converter) and a post-amplifier. An optical signal that has been RZ-coded is supplied to the E/O. The transmitter pre-chirps the optical signal. The pre-chirp is performed by red-chirp of which the value of the chirping parameter α is positive. When the pre-chirp is performed, the non-linear effect of the optical signal on the transmission line can be canceled. In addition, with the RZ coded signal, the inter-symbol interference can be alleviated. Thus, the total dispersion amount of the dispersion compensator can be suppressed. In addition, the power of the optical output can be increased.
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Kawasaki Yumiko
Miyauchi Akira
Okano Satoru
Yamane Kazuo
Fujitsu Limited
Pascal Leslie
Staas & Halsey , LLP
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