注入半导体激光器混沌相位周期控制方法研究

Chaotic controlling via phase periodicity in optical injection semiconductor lasers

提出外部光注入半导体激光器混沌相位控制方法,通过周期调制注入光的相位相移将激光器的混沌控制到多种周期状态.数值结果表明:在不同强度光注入下,(1)通过半波长周期相位相移调制控制混沌激光到周期态、双周期态、三周期态、四周期态以及多周期态等;(2)通过四分之一波长周期相位相移调制控制混沌激光到周期态和多周期态,并在高频调制控制时能够产生激光锁模现象,其锁模区域是19—21GHz;(3)波长周期相位相移调制控制也能使混沌激光控制到三周期态和多周期态等.

In this paper, a method of chaotic controlling is presented via controlling the phase in semiconductor lasers under to external optical injection. Chaos can be controlled to a periodic state or multi-periodic states by periodically modulating a phase-controller to control the injection light phase. Under the conditions of different intensities of injection light, numerical results shou thet： （1） Chaos is controlled into periodic state, dual-periodic state, triple-periodic state, four fold-periodic state and multi-periodic state respectively by a method of half-wavelength periodic modulation; （2） Chaos can be controlled into periodic state or multi- periodic state by the method of quarter-wavelength periodic modulation. Injection-locking phenomena in laser is produced under the conditions of high frequency modulation, where the frequency-locking domain is from 19GHz to 21GHz; （3） Chaos is alSO controlled into periodic state and multiperiodic state by a method of a wavelength periodic modulation.