【摘 要】
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We investigate the phase-preserving amplitude regenerative characteristics of the retu-to-zero (RZ) differentialphase-shift-keying (DPSK) wavelength conversion
【机 构】
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Department of Electronic Engineering,Tsinghua University,Beijing 100084
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We investigate the phase-preserving amplitude regenerative characteristics of the retu-to-zero (RZ) differentialphase-shift-keying (DPSK) wavelength conversion based on four-wave mixing (FWM) in a semiconductor optical amplilier (SOA).The Q-factor and the optical signal-to-noise ratio (OSNR) before and after conversion are experimentally obtained and analysed in different input noise power leveis.In both the continuous-wave and synchronous clock pumping cases,we find that there is amplitude damping in the FWM conversion due to the gain saturation of SOA,which can suppress the amplitude fluctuation of the converted DPSK signal before and after demodulation.We have achieved 2-dB Q penalty improvement in our experiment demonstration of 10Gbit/s RZ-DPSK signal with OSNR lower than 19dB.
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