Feng Zhongyao, Rong Qiangzhou, Qiao Xueguang, Shao Zhihua, Su Dan
Appl Opt. 2014 Sep 20;53(27):6237-42. doi: 10.1364/AO.53.006237.
Different soliton types are observed in a net-normal group-dispersion fiber laser based on nonlinear polarization rotation for passive mode locking. The proposed laser can deliver a dispersion-managed soliton, typical dissipation solitons, and a quasi-harmonic mode-locked pulse, a soliton bundle, and especially a dark pulse by only appropriately adjusting the linear cavity phase delay bias using one polarization controller at the fixed pump power. These nonlinear waves show different features, including the spectral shapes and time traces. The experimental observations show that the five soliton types could exist in the same laser cavity, which implies that integrable systems, dissipative systems, and dark pulse regimes can transfer and be switched in a passively mode-locked laser. Our studies not only verify the numeral simulation of the different soliton-types formation in a net-normal group-dispersion operation but also provide insight into Ginzburg-Landau equation systems.
在基于非线性偏振旋转实现被动锁模的净正常群色散光纤激光器中观察到了不同类型的孤子。所提出的激光器仅通过在固定泵浦功率下使用一个偏振控制器适当调整线性腔相位延迟偏置，就能产生色散管理孤子、典型的耗散孤子、准谐波锁模脉冲、孤子束，特别是暗脉冲。这些非线性波表现出不同的特征，包括光谱形状和时间轨迹。实验观察表明，这五种孤子类型可以存在于同一激光腔中，这意味着可积系统、耗散系统和暗脉冲区域可以在被动锁模激光器中转移和切换。我们的研究不仅验证了净正常群色散操作中不同孤子类型形成的数值模拟，还为金兹堡 - 朗道方程组提供了深入见解。
