Single-SOA-Based Ultrahigh-Speed All-Optical Half Subtracter with PolSK Modulated Signals |
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| Authors: | LI Pei-Li HUANG De-Xiu ZHANG Xin-Liang WANG Yang |
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| Affiliation: | College of Optoelectronic Engineering, Nanjing University of Posts and Telecommunications, Nanjing 210046Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074 |
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| Abstract: | 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, pattern-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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| Keywords: | 42 79 Ta 85 60 -q |
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