论文标题
基于模态分解的高度多模式纤维束的焦点场分析
Focal field analysis of highly multi-mode fiber beams based on modal decomposition
论文作者
论文摘要
在这项工作中，通过高度多模式纤维传播后，采用数值模态分解方法来建模激光光的光场。分解的算法基于沿激光束苛性剂的测得的强度谱的重建，考虑了从光谱分析得出的相干性层间程度。为了提高模型的准确性，应用和讨论了不同的方法和策略。提出的分解为一组LP模式，可以通过高度多模式纤维对辐射传输的波光模拟，并以任意修改的复杂幅度分布对自由空间传播进行分析。
In this work, a numerical modal decomposition approach is applied to model the optical field of laser light after propagating through a highly multi-mode fiber. The algorithm for the decomposition is based on the reconstruction of measured intensity profiles along the laser beam caustic with consideration of intermodal degrees of coherence derived from spectral analysis. To enhance the accuracy of the model, different approaches and strategies are applied and discussed. The presented decomposition into a set of LP modes enables both the wave-optical simulation of radiation transport by highly multi-mode fibers and, additionally, the analysis of free-space propagation with arbitrarily modified complex amplitude distributions.
