标题： 纯四阶孤子 显示英文标题

标题： Pure-Quartic Solitons

摘要： 时间光孤子由于其引人入胜的物理特性和在超快光学和超连续谱生成中的应用，一直是研究的热点。常规的亮光孤子是由于异常群速度色散和自相位调制相互作用产生的。在这里，我们报告了一类全新的亮孤子的发现，这种孤子纯粹是负四阶色散和自相位调制相互作用的结果，即使在正常群速度色散的情况下也可以出现。我们提供了基本纯四阶孤子形状保持传播和平坦时间相位的实验和数值证据，以及高阶纯四阶孤子周期性调制传播的实验和数值证据。通过解析理论，我们推导了基本纯四阶孤子的近似形状，与我们的实验观察结果有很好的一致性。我们的发现得益于光子晶体波导的独特色散特性，可能在通信和超快激光器中找到应用。 显示英文摘要

摘要： Temporal optical solitons have been the subject of intense research due to their intriguing physics and applications in ultrafast optics and supercontinuum generation. Conventional bright optical solitons result from the interaction of anomalous group-velocity dispersion and self-phase modulation. Here we report the discovery of an entirely new class of bright solitons arising purely from the interaction of negative fourth-order dispersion and self-phase modulation, which can occur even for normal group-velocity dispersion. We provide experimental and numerical evidence of shape-preserving propagation and flat temporal phase for the fundamental pure-quartic soliton and periodically modulated propagation for the higher-order pure-quartic solitons. Using analytic theory, we derive the approximate shape of the fundamental pure-quartic soliton exhibiting excellent agreement with our experimental observations. Our discovery, enabled by the unique dispersion of photonic crystal waveguides, could find applications in communications and ultrafast lasers.