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理论研究耦合反馈半导体激光器混沌同步及其在光学数字逻辑门中的应用,构建了三种基本的全光XNOR,NOR,NOT门以及光电复合NOR光学数字逻辑门的物理模型,定义了这些逻辑门的计算原理和方法.基本物理方法是,让外部光注入到2个激光器中产生激光混沌输出,通过两激光器激光的相互耦合及反馈实现混沌同步.在此基础上,利用光的外部调制方法让两相互耦合激光分别在振幅调制下控制混沌同步或非同步,实现了全光逻辑门的功能与计算.然后联合激光的外部调制和激光器电流调制,控制混沌同步或者非同步,实现了光电复合逻辑门的功能与计算.另外,详细地数值分析了激光混沌再同步与再非同步对逻辑输出影响等问题,结果证明了该方案的科学合理性与可行性.
The chaos synchronization of the coupled feedback semiconductor laser and its application in optical digital logic gate are theoretically studied. Three basic physical models of all-optical XNOR, NOR, NOT gate and photoelectric composite NOR optical digital logic gate are constructed. These logic gates The basic physics method is that the external light is injected into the two lasers to generate the laser chaos output and the chaos synchronization is realized through the mutual coupling and feedback of the two laser lasers.On the basis of this, The mutual coupling laser controls the chaos synchronization or asynchronization under the amplitude modulation respectively, and realizes the function and calculation of the all-optical logic gate. Then the external laser modulation and the laser current modulation are combined to control the chaos synchronization or asynchronization to realize the photoelectric composite logic Function and calculation of the door.In addition, the effects of laser chaos resynchronization and re-asynchrony on the logic output are analyzed numerically in detail. The result proves the scientific rationality and feasibility of the scheme.