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首页> 外文期刊>Optics Letters >Carrier-envelope phase-stable spatiotemporal light bullets
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Carrier-envelope phase-stable spatiotemporal light bullets

机译：载波包络相位稳定时空光弹

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摘要

We present an extensive experimental investigation of the self-focusing and filamentation of intense 90 fs, 1.8 mu m, carrier-envelope phase-stable laser pulses in fused silica in the anomalous group velocity dispersion region. Spectral measurements in a wedge-shaped sample uncover dynamics of spectral broadening, which captures the evolution of third-harmonic, resonant radiation, and supercontinuum spectra as a function of the propagation distance with unprecedented detail. The relevant events of spectral broadening are linked to the formation and propagation dynamics of spatiotemporal light bullets as measured by a three-dimensional imaging technique. We also show that at a higher input power, the light bullet splits into two bullets, which retain characteristic O-shaped spatiotemporal intensity distributions and propagate with different group velocities. Finally, we demonstrate that the light bullets have a stable carrier-envelope phase that is preserved even after the bullet splitting event, as verified by f-2f interferometric measurements. (C) 2015 Optical Society of America
机译：我们提出了关于熔融石英中强烈的90 fs，1.8μ m，载波包络相位稳定激光脉冲在异常群速度色散区域的自聚焦和成丝的广泛实验研究。楔形样品中的光谱测量揭示了光谱展宽的动力学，它以前所未有的细节捕获了三次谐波、共振辐射和超连续谱谱作为传播距离函数的演变。光谱展宽的相关事件与通过三维成像技术测量的时空光子弹的形成和传播动力学有关。我们还表明，在较高的输入功率下，光子弹分裂成两颗子弹，它们保留了特征性的O形时空强度分布，并以不同的群速度传播。最后，我们证明了光子弹具有稳定的载流子包络相位，即使在子弹分裂事件之后也能保持，正如f-2f干涉测量所验证的那样。（C） 2015年美国光学学会

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