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Observation of new modal patterns in experiments with Hermite Gaussian and Laguerre-Gaussian laser modes

机译:用Hermite高斯和Laguerre-Gaussian激光模式进行实验的新模式模式的观察。

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We present several experiments that allow us to show the intensity and phase structure of transverse modal patterns, Hermite-Gaussian and Laguerre-Gaussian laser modes and dynamical transverse patterns. These new spatial configurations of the light depend on the dynamics of laser resonator, and on the boundary conditions. The Laguerre-Gaussian modes are obtained either by the direct conversion of Hermite-Gaussian modes using a modal converter or with a computer-generated hologram. The modal converter is based on a cavity of cylindrical lenses. We analyse the phase structure and optical phase singularities of laser modes with a Mach-Zehnder interferometer. The resulting interference patterns clearly illustrate the azimuthal phase dependence of the Laguerre-Gaussian modes, which is the origin of the orbital angular momentum associated with each one of them. Moreover, we try to give an explanation of the new modal patterns observed.
机译:我们提出了几个实验,这些实验使我们能够显示出横向模态图案,埃尔米-高斯和拉盖尔-高斯激光模和动态横向图案的强度和相位结构。光的这些新的空间配置取决于激光谐振器的动力学以及边界条件。 Laguerre-Gaussian模式是通过使用模态转换器或计算机生成的全息图直接转换Hermite-Gaussian模式获得的。模态转换器基于圆柱透镜的腔。我们使用Mach-Zehnder干涉仪分析了激光模式的相位结构和光学相位奇点。由此产生的干涉图清楚地说明了拉盖尔-高斯模的方位角相位依赖性,这是与它们每个相关的轨道角动量的起源。此外,我们尝试对观察到的新模式进行解释。

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