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研究了偏振选择互注入条件下半导体激光器的同步和混沌滤波效应。将单模互注入速率方程扩展为包含两个偏振态的理论模型,并选择X偏振态作为互注入形式,不仅为激光器产生混沌和实现同步提供了条件,还可以完全抑制Y偏振光,实现了纯偏振模式同步。通过频率失调的引入,保持了激光器主从地位的稳定。研究结果表明,主从激光器实现了时差等于注入延时的混沌同步,输出功率表现出高频振荡并伴随有对称性破坏现象。对主激光器进行调制时,同步系统表现出与单向注入相似的混沌滤波效应;对从激光器进行调制时,系统的混沌滤波效应并不明显。
The synchronization and chaos filtering effects of the semiconductor lasers under polarization selective interpenetrating injection are studied. The single-mode mutual injection rate equation is expanded to include two theoretical models of polarization states and the X-polarization state is selected as the mutual injection mode, which not only provides the conditions for the laser to generate chaos and synchronization, but also completely suppresses the Y-polarized light and realizes Pure Polarization mode synchronization. Through the introduction of frequency offset, to maintain the stability of the master and slave status. The results show that the master-slave laser achieves the chaotic synchronization with the time difference equal to the injection delay, and the output power shows high-frequency oscillation with the symmetry destruction. When the main laser is modulated, the synchronization system shows the similar chaotic filtering effect as unidirectional injection. When the laser is modulated, the chaos filtering effect of the system is not obvious.