激光系统的不稳定性分布

THE DISTRIBUTION OF INSTABILITIES IN LASER SYSTEM

利用数值计算的方法，研究了受调制的单模行波激光器中出现的分岔和混沌，尤其是在控制参数空间中的整体分布。分岔和混沌出现在一些相对较小的“岛状”区域；调制频率在某一区域之外，系统的稳定性增加；在一些参数区，倍周期与加周期共存，但没有进入混沌，而由单个２Ｔ周期轨道直接失稳进入混沌。

By numerical calculation, the bifurcation and chaos in the modulated system of single mode homogenously broadened travelling laser were studied, expecially the whole distribution in the controlling parameter space. Bifurcation and chaos emerge in some smaller “island” domains. Beyond some values of modulated frequence, the stability increases. The period doubling and period adding coexist in some parameter domain, but they don′t enter the chaos from the bifurcation, and they directly enter the chaos from one 2T period limit cycle instead.