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提出一种基于级联半导体光放大器(SOA)中的交叉增益调制(XGM)效应实现的全光逻辑与门新方案。该方案采用单端耦合半导体光放大器提高第一级半导体光放大器输出的消光比,合理控制第二级半导体光放大器的输入光功率,实现了两路2.5Gbit/s非归零(NRZ)信号的逻辑与运算。详细阐明了基于级联半导体光放大器的与门的工作原理和实验方案,分析了实验结果。根据实验结果,发现第一级半导体光放大器输出信号的消光比和信噪比对逻辑与运算结果影响较大,利用单端耦合半导体光放大器后能改善逻辑与运算结果,第二级半导体光放大器的输入抽运光功率对逻辑与运算输出的信号质量有较大的影响。合理控制这些因素,可以有效地提高该逻辑与门的输出特性。
A new all-optical logic AND gate scheme based on the cross-gain modulation (XGM) effect in cascaded semiconductor optical amplifiers (SOA) is proposed. The scheme uses a single-ended coupled semiconductor optical amplifier to increase the extinction ratio of the first-stage semiconductor optical amplifier and controls the input optical power of the second-stage semiconductor optical amplifier rationally so as to realize two 2.5Gbit / s non-return to zero (NRZ) signals Logic and computing. The operating principle and experimental scheme of AND gate based on cascaded semiconductor optical amplifier are expounded in detail, and the experimental results are analyzed. According to the experimental results, it is found that the extinction ratio and the signal-to-noise ratio of the output signal of the first-stage semiconductor optical amplifier have a great influence on the results of the logic operation. By using the single-ended coupled optical semiconductor amplifier, the logic and operation results can be improved, and the second-stage semiconductor optical amplifier The input pump optical power has a great effect on the signal quality of logic and operation output. Reasonable control of these factors, can effectively improve the output characteristics of the logic and the door.