【摘 要】
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A novel ultrahigh-speed all-optical half subtracter based on four-wave mixing (FWM) in a single semiconductor optical amplifier (SOA) is proposed. This scheme o
【机 构】
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College of Optoelectronic Engineering,Nanfing University of Posts and Telecommunications,Nanjing 210
论文部分内容阅读
A novel ultrahigh-speed all-optical half subtracter based on four-wave mixing (FWM) in a single semiconductor optical amplifier (SOA) is proposed. This scheme only requires a single SOA and two input signals without additional light source,so it is quite simple and compact.Due to the polarization-shift-keying (PolSK) modulated signals being used in this scheme,patte-dependent degradation can be avoided. By numerical simulation,dependence of the critical factors of the logic gate performance,e.g.,the output power of logic 1 and extinction ratio (ER),on two input signals power is investigated.In addition,the effect of the gain polarization dependence of SOA is analysed.
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