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Visualizing the mode evolution process in passive and active cavities based on the NlW-Principle

机译：基于NW原理可视化被动腔和主动腔中的模式演化过程

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This paper will present results of computer models depicting the evolution of diffractive processes through passive and active cavities (traditional stable resonator and single mode fiber) as the number of passes (or the length of propagation) increases. The objective is to visualize how the spatially stable eigen-modes evolve with propagation. Our core assumptions are the validity of the Huygens-Fresnel hypothesis of secondary wavelets and the recently articulated Noninteraction of Waves (NIW) principle in this conference series. The NlW-principle implies that even the diffracted secondary wavelets propagate conjointly but without re-arranging their spatial energy distribution unless one inserts some interacting material medium within the diffracting beam. Accordingly, we anticipate that the evolution of the measurable energy distribution in the diffraction pattern will be different in the presence of gain medium whose gain profile varies in the direction orthogonal to the cavity axis. We also anticipate that a cavity with high gain profile will generate the stable spatial eigen-mode with a fewer number of passes through the cavity than with lower gain, or no gain. We will also present the mode evolution process when the seed signal is a pulse of length that is shorter than that of the cavity. We believe this paper will provide useful insights to the students who are introduced to the concept of spatially well defined Gaussian laser modes for the first time.
机译：本文将介绍计算机模型的结果，这些模型描述了随着通过次数（或传播长度）的增加，通过无源腔和有源腔（传统稳定谐振器和单模光纤）的衍射过程的演变。目的是可视化空间稳定的本征模式如何随传播演化。我们的核心假设是次级小波的惠更斯-菲涅耳假设的有效性以及本次会议系列中最近明确阐述的非波互作用（NIW）原理。 NlW原理意味着，即使被衍射的次级子波也联合传播，但没有重新布置其空间能量分布，除非人们在衍射光束内插入了一些相互作用的材料介质。因此，我们预期在存在增益介质沿垂直于腔轴的方向变化的增益介质的情况下，衍射图样中可测量能量分布的变化将有所不同。我们还预计，具有高增益轮廓的腔将通过比通过低增益或无增益的通道更少的次数来生成稳定的空间本征模。当种子信号的脉冲长度短于空腔的脉冲时，我们还将介绍模式演化过程。我们相信本文将为首次了解空间清晰定义的高斯激光模式概念的学生提供有益的见解。

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