标题： 快速扫描白光泵浦-探测光谱学与100 kHz逐脉冲检测 显示英文标题

标题： Rapid Scan White Light Pump-Probe Spectroscopy with 100 kHz Shot-to-Shot Detection

摘要： 我们展示了一种飞秒泵浦-探测光谱仪，它利用白光超连续谱作为输入，并依赖声光调制器、泵浦-探测延迟阶段和CCD相机的相互同步，以记录逐次泵浦-探测光谱，同时泵浦-探测延迟与激光重复率同步扫描。 这里实现的技术独特组合使得电子可控制且重复率可扩展的检测吞吐量仅受限于相机帧率。 尽管白光探测的均方根波动约为5.5%，但充分利用白光的时间相关性，在泵浦-探测延迟上进行精细采样，并相比步进扫描减少了30倍的等效数据采集时间，从而在无需多通道参考的情况下将均方根噪声降低至约0.33 mOD，针对散射纳米管样品。 这一演示为具有宽带光谱覆盖和最小样品暴露的散射样品的脉冲泵浦-探测显微光谱学打开了大门。 显示英文摘要

摘要： We demonstrate a femtosecond pump-probe spectrometer which utilizes a white light supercontinuum as input, and relies on mutual synchronization of acousto-optical chopper, pump-probe delay stage and the CCD camera to record shot-to-shot pump-probe spectra while the pump-probe delay is scanned synchronously with the laser repetition rate. The unique combination of technologies implemented here allows for electronically controllable and repetition-rate scalable detection throughput that is only limited by the camera frame rate. Despite RMS white-light probe fluctuations of ~5.5%, fully leveraging the temporal correlations in white light and fine sampling of pump-probe delay along with 30x reduction in equivalent data collection time compared to stepwise scanning leads to reduction of RMS noise without multichannel referencing down to ~0.33 mOD for a scattering nanotube sample. This demonstration opens door for impulsive pump-probe micro-spectroscopy of scattering samples with broadband spectral coverage and minimized sample exposure.