All-optical XNOR and AND gates simultaneously realized in a single semiconductor optical amplifier with improved dynamics |
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| Authors: | Li Pei-Li Huang De-Xiu Zhang Xin-Liang and Zhu Guang-Xi |
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| Affiliation: | Wuhan National Laboratory for Optoelectronics, Huazhong University of Science and Technology, Wuhan 430074, China; Department of Electronics and Information, Huazhong University of Science andTechnology, Wuhan 430074, China |
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| Abstract: | All-optical XNOR and AND logic gates using four-wave mixing (FWM) and
cross-gain modulation (XGM) in a single semiconductor optical
amplifier (SOA) with improved dynamics are simultaneously realized.
By numerical simulation, the effects of the input optical wave powers
and injection current on the critical factors of the logic gate
performances, such as the ON--OFF contrast ratio, the power-output
level of the logic `1', and the difference between power outputs of
the logic `1', are investigated in detail. In addition, the effect of
the counter-propagating CW pump on the gain recovery is analysed. |
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| Keywords: | All-optical logic gate four-wave mixing cross-gain modulation semiconductor optical
amplifier |
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