Optical transmission system using optical phase modulator
OwnerGyu-Woong Lee, Byung-Chang Kang +2inventors
InventorsGyu-Woong Lee, Byung-Chang Kang, Han-Lim Lee, Seong-Taek Hwang
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Abstract
Disclosed is an optical transmission system that can improve transmission quality and perform high-speed transmission by using a conventional optical phase modulator. The optical transmission system employs a duobinary technique using a phase modulator, so as to overcome the dependency of transmission quality on the filtering characteristic and the bit pattern as in the conventional duobinary transmission system having a low pass filter, and to improve the non-linearity and dispersion characteristics of the NRZ transmission of more than 10 Gbps, and to further realize a transmitter capable of generating DCS-RZ.
Claims7
An optical transmission system using an optical phase modulator, comprising:
- a duobinary modulating section for receiving a carrier and NRZ data, for modulating phases of the carrier and the NRZ data, and for filtering the carrier and the NRZ data, so as to output a duobinary NRZ signal;
- and,
- a carrier suppressed RZ section in which the duobinary NRZ signal from the duobinary modulating section is inputted and a clock signal having a predetermined cycle is applied to a modulator, so as to output a carrier suppressed RZ signal.
Dependencies are inferred from the claim text.