二次晶体中双聚焦光束的产生
Twin Spotlight Beam Generation in Quadratic Crystals
摘要：
在过去的二十年里，光学无赖波得到了广泛的研究。然而，多维极端波事件的观测仍然令人惊讶的稀缺。在这项工作中，我们提出了在二次非线性晶体中自发产生空间局域化的二维光束的实验演示，这是由在基波和二次谐波频率的孪生组件。这些局部光斑从宽背景光束中出现，并最终随着激光束强度的逐渐增加而消失。
英文摘要：
Optical rogue waves have been extensively studied in the past two decades. However, observations of multidimensional extreme wave events remain surprisingly scarce. In this work we present the experimental demonstration of the spontaneous generation of spatially localized two-dimensional beams in a quadratic nonlinear crystal, which are composed by twin components at the fundamental and the second-harmonic frequencies. These localized spots of light emerge from a wide background beam, and eventually disappear as the laser beam intensity is progressively increased.
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