We describe theoretically and verify experimentally a novel, to the best of our knowledge, class of diffraction-free pulsed optical beams that are “omni-resonant”: they have the remarkable property of transmission through planar Fabry–Perot resonators without spectral filtering, even if their bandwidth far exceeds the cavity linewidth. Ultrashort wave packets endowed with a specific spatiotemporal structure couple to a single resonant mode independent of its linewidth. We confirm that such “space–time” omni-resonant wave packets retain their bandwidth (1.6 nm), spatiotemporal profile (1.3-ps pulse width, 4-µm beam width), and diffraction-free behavior upon transmission through cavities with resonant linewidths of 0.3 nm and 0.15 nm.

中文翻译：

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全共振时空波包

据我们所知，我们在理论上进行了描述并通过实验进行了验证，这是一类新颖的“全共振”无衍射脉冲光束：它们具有通过平面Fabry-Perot共振器传输的显着特性，即使没有光谱过滤，甚至如果它们的带宽远远超过腔体线宽。具有特定时空结构的超短波数据包耦合到单个谐振模式，而与线宽无关。我们确认，这种“时空”全共振波包在通过具有共振线宽的腔体传输时，仍保持其带宽（1.6 nm），时空分布（1.3 ps脉冲宽度，4 µm束宽）和无衍射行为。 0.3nm和0.15nm。