非线性偏振旋转锁模光纤laser的倍周期本征态
Period doubling eigenstates in a fiber laser mode-locked by nonlinear polarization rotation
摘要：
由于单模光纤的弱双折射特性，即使腔内有起偏器，在光纤激光器中产生的孤子也是矢量脉冲，并呈现出包括偏振演化在内的周期性参数变化。非线性偏振旋转锁模光纤激光器中孤子的倍周期本征态，即，孤子的偏振分量的倍周期，进行了详细的数值研究。我们发现，除了两个偏振分量之间的同步演变，存在异步发展取决于详细的操作条件。此外，可以实现一个偏振分量的倍周期与另一偏振分量的周期一一起。当获得三倍周期窗口时，可以观察到两个偏振分量上的复杂动力学。
英文摘要：
Due to the weak birefringence of single mode fibers, solitons generated in fiber lasers are indeed vector pulses and exhibit periodic parameter change including polarization evolution even when there is a polarizer inside the cavity. Period doubling eigenstates of solitons generated in a fiber laser mode-locked by the nonlinear polarization rotation, i.e., period doubling of polarization components of the soliton, are numerically explored in detail. We found that, apart from the synchronous evolution between the two polarization components, there exists asynchronous development depending on the detailed operation conditions. In addition, period doubling of one polarization component together with period-one of another polarization component can be achieved. When the period tripling window is obtained, much complexed dynamics on the two polarization components could be observed.
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