激光混沌耦合反馈光电及全光逻辑门研究

理论上利用两个混沌半导体激光器的耦合反馈,构建了两种基本的光电及全光门.基本方法是,让外部光注入到两个激光器中而导致激光混沌,通过两激光器激光的相互耦合及反馈实现同步;在这基础上,一是让两激光器分别在电流调制下,控制混沌同步或者非同步,实现光电逻辑门的功能与计算;二是利用光的外部调制方法让两相互耦合激光分别在相位调制下,控制混沌同步或者非同步,并最终实现全光逻辑门的功能与计算.数值结果证明了两方法的可行性.关键词：混沌逻辑门激光器同步

Optoelectronic or all-optical logic gates using chaotic semiconductor lasers using mutual coupling-feedback

We present theoretically the construction of the fundamental gates using two injection semiconductor laser diodes by muans of mutual coupling-feedback. Two laser diodes driven by a common monochromatic light beam run chaos while chaotic synchronization between the two lasers is achieved by coupling-feedback. The optoelectronic logic gate is implemented by appropriately synchronizing or de-synchronizing the two chaotic states by modulating the currents. The all-optical logic gate is finally implemented by appropriately synchronizing or de-synchronizing the two chaotic states via the modulators modulating the coupling lights, which is an external optical modulation method. Numerical results validated the feasibility of the method.