Hu Hongtao, Flöry Tobias, Stummer Vinzenz, Pugzlys Audrius, Zeiler Markus, Xie Xinhua, Zheltikov Aleksei, Baltuška Andrius
Photonics Institute, Technische Universität Wien, Gußhausstraße 27-29, Vienna, A-1040, Austria.
SwissFEL, Paul Scherrer Institute, Villigen PSI, 5232, Switzerland.
Light Sci Appl. 2024 Feb 29;13(1):61. doi: 10.1038/s41377-023-01367-0.
We present a novel approach for Stimulated Raman Scattering (SRS) spectroscopy in which a hyper spectral resolution and high-speed spectral acquisition are achieved by employing amplified offset-phase controlled fs-pulse bursts. We investigate the method by solving the coupled non-linear Schrödinger equations and validate it by numerically characterizing SRS in molecular nitrogen as a model compound. The spectral resolution of the method is found to be determined by the inverse product of the number of pulses in the burst and the intraburst pulse separation. The SRS spectrum is obtained through a motion-free scanning of the offset phase that results in a sweep of the Raman-shift frequency. Due to high spectral resolution and fast motion-free scanning the technique is beneficial for a number SRS-based applications such as gas sensing and chemical analysis.
我们提出了一种用于受激拉曼散射（SRS）光谱学的新方法，其中通过采用放大的偏移相位控制飞秒脉冲串实现了高光谱分辨率和高速光谱采集。我们通过求解耦合非线性薛定谔方程来研究该方法，并通过对作为模型化合物的分子氮中的SRS进行数值表征来验证它。发现该方法的光谱分辨率由脉冲串中的脉冲数与脉冲串内脉冲间隔的反比决定。通过对偏移相位进行无运动扫描获得SRS光谱，该扫描导致拉曼频移频率的扫描。由于高光谱分辨率和快速无运动扫描，该技术有利于许多基于SRS的应用，如气体传感和化学分析。
