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提出一种能够同时应用于强度调制与相位调制信号的全光异或(XOR)逻辑门方案,利用π相移后两束光信号的直接干涉来实现异或逻辑操作。通过仿真验证了该方案对输入为强度调制与相位调制信号的异或操作的可行性与有效性。在输入为10Gb/s强度调制信号,两输入信号占空比小于0.4,峰值功率相同时,异或输出Q因子为103;当输入为10Gb/s,调制深度为π的相位调制信号时,异或输出Q因子为272。
An all-optical XOR logic gate scheme which can be applied to both intensity modulation and phase modulation signals is proposed. The XOR logic gate is implemented by the direct interference of two optical signals after π-phase shift. The feasibility and validity of this scheme to the XOR operation of input intensity modulation and phase modulation signals are verified by simulation. When the input is a 10Gb / s intensity modulated signal, the duty cycle of the two input signals is less than 0.4, and the peak power is the same, the Q-factor of the XOR output is 103. When the input is a phase modulated signal of 10Gb / s and the modulation depth is π, Or output Q factor 272.