Novel fixed-pattern phase modulation scheme is proposed to suppress the IFWM-induced ghost pulses in 40Gbps RZ optical transmission systems through destructing the interference of the IFWM components in symmetric patterns. More than 3dBm launch power margin is achieved. It is a cost-effective method to improve the performance of 40Gbps RZ systems due to greater nonlinearity tolerance.
© 2005 Optical Society of America
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