论文标题
快速扫描白色轻泵探针光谱，带有100 kHz射击检测
Rapid Scan White Light Pump-Probe Spectroscopy with 100 kHz Shot-to-Shot Detection
论文作者
论文摘要
我们展示了一种飞秒的泵探针光谱仪，它利用白光超级纤维作为输入，并依赖于声学斩波器，泵送延迟阶段和CCD摄像头的相互同步来记录泵送泵送泵送光谱，而泵送泵送延迟则与Lasererecretiention一起扫描。此处实施的技术的独特组合允许电子控制和重复率可伸缩检测吞吐量仅受摄像机帧速率的限制。尽管RMS白光探针波动率为约5.5％，但完全利用了白光下的时间相关性和泵探针延迟的精细采样，以及逐步扫描的等效数据收集时间的30倍减少，导致RMS噪声的减少而无需多键型噪声，而无需多键盘引用到〜0.33模式下，以降低〜0.33散射NanAnotube样品。该演示为具有宽带光谱覆盖范围和最小化样品暴露的散射样品的冲动泵探针微光谱镜开门。
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.
