Ultrabroadband Supercontinuum Measurement and Optical Rogue Waves

这项研究项目的目标是开发一种简单的单次发射装置，用于测量超宽带超连续谱的完整强度和相位随时间的变化。超宽带超连续谱是一种重要的光源，具有简单的激光空间特性，但具有极其复杂的白光光谱特性。智能价值该装置将首次测量有史以来产生的一些最复杂的光脉冲，工作速度高达每秒30,000个脉冲。它实用、方便、准确、宽带、可靠，并能对测量精度产生反馈。它不需要参考脉冲，可以在任何有偏振器和摄像机的波长范围内工作。此外，该项目还将与法兰西大学的约翰·达德利教授合作，利用这一新设备对新发现的光学无赖波进行研究。在超连续谱中--被认为类似于在公海平静水域中观察到的大幅度水波的强烈光波，被认为是造成许多臭名昭著的海洋灾难的原因。拟议中的设备不仅以此类研究所需的高速率测量这种脉冲，而且还自然地产生光谱图，直接揭示流氓波。更广泛的影响超连续谱的许多应用，从生物医学成像到分子光谱学，从遥感(激光雷达)到阿秒脉冲产生到超精密计量，都将从准确测量(从而控制)它的能力中受益匪浅。此外，这项研究可能会改善对海洋无赖波的理解，或许还会发现它们的前身。

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.