Ultrabroadband Supercontinuum Measurement and Optical Rogue Waves

本研究的目的是发展一种简单的单次激发装置，用于测量超宽带超连续谱的完整强度和相位与时间的关系。一种重要的光源，具有简单的激光束空间特性，但却具有极其复杂的白光光谱特性。它实用、方便、准确、宽频带、可靠，并能反馈测量精度。它不需要参考脉冲，并且可以在偏振器和相机可用的任何波长范围内工作。此外，与弗朗什-孔泰大学的John达德利教授合作，该项目将使用这种新设备来研究新发现的？光学异常波在超连续谱中？强烈的光波，被认为类似于在公海中观察到的大振幅水波，否则就是平静的沃茨，被认为是造成许多臭名昭著的海上灾难的原因。 该设备不仅可以以这种研究所需的高速率测量这种脉冲，而且还可以自然地生成频谱图，直接揭示异常波。更广泛的影响超连续谱的所有应用，从生物医学成像到分子光谱学到遥感（激光雷达）到阿秒脉冲产生到超精密计量学，都将从精确测量（从而控制）它的能力中受益匪浅。此外，这项研究可能会导致对海洋流氓波的更好理解，也许会发现它们的前兆。

The objective of this research project is to develop a simple single-shot device for measuring the complete intensity and phase vs. time of ultrabroadband supercontinuum?an important light source with simple laser-beam spatial properties but extremely complex white-light spectral properties.Intellectual meritThe proposed device will for the first time measure some of the most complex light pulses ever generated, operating at up to 30,000 pulses per second. It is practical, convenient, accurate, broadband, and reliable and yields feedback on the measurement accuracy. It does not require a reference pulse and can operate over any wavelength range where polarizers and cameras are available. Also, in collaboration with Prof. John Dudley from the University of Franche-Comté, this project will use this new device to perform studies of newly discovered ?optical rogue waves? in supercontinuum?intense optical waves considered analogous to large-amplitude water waves observed in the open sea in otherwise calm waters and thought to be responsible for numerous infamous maritime disasters. The proposed device, not only measures such pulses at the high rate required for such studies; it also naturally generates spectrograms, which directly reveal rogue waves. Broader impactAll of the many applications of supercontinuum, from biomedical imaging to molecular spectroscopy to remote sensing (lidar) to attosecond-pulse generation to ultra-precise metrology, will benefit greatly from the ability to accurately measure (and hence control) it. Further, this research could lead to improved understanding of oceanic rogue waves and perhaps the discovery of their precursors.