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Holographic grating - a useful tool

机译:全息光栅-有用的工具

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Holography enables us to create various optical elements, in a simply way. They can be used for any purpose that conventional optical elements can be used for. Especially holographic gratings can demonstrate the advantage of such an approach. To make the dense line structure of a grating classically, a special ruling engine had to be used. Instead mechanically ruled grating grooves a hologram of a plane wave with plane reference wave can be recorded. The interference pattern has the form of regular parallel strips - intensity maxims and the grating interval can be changed very simply, by choosing a proper angle between the interfering waves. Exposition allows us to form the grating profile.The contribution is to present some of our results, applicable during educational process (master study - Optics, lasers and optical spectroscopy), too.A holographic grating may become a simple and useful tool to reveal real temporal coherence properties of widely used laser diode modules and determine frequency spacing Av when more longitudinal modes are generated.Moreover, when choosing a proper angle between two interfering waves creating the grating, the grating interval A may become less than the wavelength X, and a sub-wavelength structure can be created in a simply way if a proper recording medium is accessible. That enables us to model light spreading phenomena when approaching sub-wavelength structures.
机译:全息技术使我们能够以简单的方式创建各种光学元件。它们可以用于常规光学元件可以用于的任何目的。特别是全息光栅可以证明这种方法的优势。为了经典地制作光栅的密集线结构,必须使用特殊的标尺引擎。代替地,可以记录机械刻划的光栅凹槽,其中可以记录平面波与平面参考波的全息图。干涉图样具有规则的平行条纹形式-强度最大值,并且通过在干涉波之间选择合适的角度,可以非常简单地改变光栅间隔。曝光使我们能够形成光栅轮廓,其贡献在于展示我们的一些结果,这些结果在教育过程中也适用(硕士研究-光学,激光和光学光谱学)。全息光栅可能成为揭示真实情况的简单而有用的工具广泛使用的激光二极管模块的时间相干特性,并在生成更多纵向模式时确定频率间隔Av。此外,当在创建光栅的两个干扰波之间选择合适的角度时,光栅间隔A可能会小于波长X,而如果可以访问适当的记录介质,则可以以简单的方式创建亚波长结构。这使我们能够在接近亚波长结构时对光扩散现象进行建模。

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