利用光纤参量放大器构成全光与门

利用光纤参量放大器(FOPA)中的波长转换特性完成全光与逻辑运算。以波长转换的原理为基础, 从两路输入光波的四种码字组合的相位匹配关系入手, 证明了FOPA的闲散光输出与两路输入光波的逻辑关系符合与门的逻辑。通过龙格-库塔方法数值求解非线性耦合方程组, 仿真证实了FOPA的输出与输入光波满足全光与门的逻辑, 研究了此全光与逻辑门闲散光波的输出功率随光纤长度、输入光波的功率比值以及输入光波波长位置的变化关系, 为实际中优化设计全光与门提供了参考。并对100 Gb/s的全光与逻辑运算中所应选择的输入光波脉冲宽度的问题进行了讨论。

All Optical AND Gate by Utilizing Fiber Optical Parametric Amplifier

The all optical AND logical operation using the wavelength conversion in the fiber optical parametric amplifier (FOPA) is completed. The logical relation between idler output and two input optical waves in the FOPA is proved through the principle of wavelength conversion and the phase match condition for four types of code word in two input optical waves. By solving nonlinear coupled equations numerically utilizing Runge-Kutta method, the all optical AND logical relation between output and two input optical waves in the FOPA is verified numerically, then the output power of idler in this all optical AND logic gate influenced by fiber length, the power ratio of two input optical waves and the values of two input wavelengths is investigated. These results are conducive to the optimized design of all optical AND logic gate in practice. The selection for the width of input optical pulse in 100Gbit/s all optical AND logical operation is discussed.