利用半导体光放大器实现10Gb／s全光半减器的组合逻辑实验研究

The Experimental Research on 10 Gb/s all-Optical Half-Subtracter by Using Semiconductor Optical Amplifier

提出了一种新型全光半减器组合逻辑方案。该方案基于两个半导体光放大器(SOA)和窄带光滤波器(NOBPF)。利用SOA的四波混频(FWM)和交叉增益调制(XGM)效应,通过调整NOBPF的中心波长,第一个SOA产生逻辑"A·B"门,提供半减器的"借位",同时该SOA产生"同或"逻辑;第二个SOA产生"非"逻辑,两个SOA级联后产生逻辑"异或"门,提供半减器的"差"位。实验中,实现了两路10 Gb/s伪随机归零(RZ)码信号间的全光半减逻辑运算。

A novel all-optical half-subtracter combination logic scheme is demonstrated, based on two semiconductor optical amplifiers （SOA） and three narrow optical bandpass filters （NOBPF）. By utilizing four-wave mixing （FWM）, cross-gain modulation （XGM） in the SOA and through adjusting narrow optical bandpass filter central wavelength, the first SOA generates A^- · B logic and provides borrow bit of half-subtracter, simultaneously the SOA generates XNOR logic; the second SOA generates NOT logic, two cascaded SOAs engender XOR logic and provides difference bit of half-subtracter. In the experiment, all-optical half-subtraction Boolean calculation is achieved between 10 Gb/s PRBS signals.