单向耦合VCSEL偏振模的同步与编码

为了研究单向耦合垂直腔面发射激光器系统的混沌动力学及其在通信中的应用,采用数值仿真的方法,理论研究了两个单向耦合的垂直腔面发射激光器偏振模的同步特性,并通过对发射激光器偏振态相位的调制实现了该系统的编码。结果表明,主激光器和从激光器相应模式间可以获得高性能的同步,而且存在两个明显的同步区域——完全同步和注入锁定同步。加载的数字信息也可以在从激光器每个偏振分量中还原,这表明可以利用单模或多横模垂直腔面发射激光器进行多信道混沌通信。

Synchronization and encoding of polarization modes of two unidirectionally coupled vertical-cavity surface-emitting lasers

To examine the chaotic dynamics and its application in communication of a unidirectionally coupled vertical-cavity surface-emitting laser (VCSEL) system,the synchronization performance of polarization modes of two unidirectionally coupled VCSELs were simulated.An encryption scheme was proposed,where the phases of the polarization states of the master laser were modulated.It was demonstrated that high synchronization could be achieved between corresponding polarization components of the master laser and the slave laser.Moreover,there were two distinct synchronization regimes,i.e.complete synchronization and injection locking synchronization.The transmitted digital information was successfully recovered at each polarization branch of the slaver laser.The results open an opportunity for multichannel chaotic communication by utilizing different polarization components in single-mode or multi-transverse-mode VCSELs.