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针对主和副垂直腔表面发射激光器构成的外部注入激光器系统的偏振转换及其非线性动力学行为,利用周期性极化铌酸锂晶体中准相位匹配线性电光调制,本文提出了一种新的操控方案并且探索了其控制规律.研究结果发现,受到平行光注入或正交光注入的副激光器输出偏振度随外加电场成周期性振荡变化,其振荡波峰轨迹包络曲线为正弦曲线,而振荡波谷轨迹包络曲线为余弦曲线;选取一定的主激光器偏置电流,通过对来自主激光器的光进行电光调制,受到两种方式注入的副激光器可以输出任意偏振模,并且其非线性动力行为经历不同的演变.另外,副激光器的偏振度仅依赖于外加电场,与副激光器的偏置电流无关.
Aiming at the polarization conversion and nonlinear dynamics of the external injection laser system composed of the main and sub-vertical cavity surface-emitting lasers, a new kind of novel phase-matching linear electro-optic modulation using periodically poled lithium niobate crystals is proposed And the control law was explored.The results show that the output polarization degree of the secondary laser injected by parallel light injection or orthogonal light changes periodically with the applied electric field and the envelope curve of the oscillation peak is sinusoidal while the oscillation By selecting a certain master laser bias current, the sub-laser injected by two ways can output any polarization mode by performing electro-optic modulation on the light from the master laser, and the nonlinear dynamic behavior of the slave laser In addition, the degree of polarization of the sub-laser depends only on the applied electric field, regardless of the bias current of the sub-laser.