论文标题
与拉曼扩增的多模纤维中相似脉冲的时空发展
Spatiotemporal evolutions of similariton pulses in multimode fibers with Raman amplification
论文作者
论文摘要
这封信是为了通过拉曼扩增的被动多模纤维中的时空相似脉冲的演示铺平道路。我们以数值为单位的问题以分级索引和步骤指数多模纤维介绍这些问题，并首先介绍了相似脉冲的复杂时空动力学。结果表明，在两个多模纤维中都可以生成相似的脉冲。脉冲的时间和光谱演化可以表征为具有线性chirp和kW峰值功率的抛物线形状。通过压缩这些，可以从初始的皮秒脉冲开始获得高能飞秒脉冲。在基本模式的主要激发下，可以保留在两个多模纤维中的空间梁曲线。具体而言，拉曼放大和相似的脉冲脉冲在分级多模纤维中产生，在不同的初始条件下改善了空间束清洁过程。
This letter is to pave the way towards the demonstration of spatiotemporal similariton pulses evolution in passive multimode fibers with Raman amplification. We present numerically these issues in a graded-index and step-index multimode fibers and provide a first look at the complex spatiotemporal dynamics of similariton pulses. The results showed that the similariton pulses can be generated in both multimode fibers. The temporal and the spectral evolution of the pulses can be characterized as parabolic shapes with linear chirp and kW peak power. By compressed these, high energy femtoseconds pulses can be obtained starting initial picoseconds pulses. Spatial beam profile could be preserved in both multimode fibers under the predominantly excitation of the fundamental mode. Specifically, Raman amplification and similariton pulses generation in graded-index multimode fiber improves the spatial beam cleaning process under the different initial condition.
