A 100 kHz Time-Resolved Multiple-Probe Femtosecond to Second Infrared Absorption Spectrometer
A 100 kHz Time-Resolved Multiple-Probe Femtosecond to Second Infrared Absorption Spectrometer
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DOI：
10.1177/0003702816631302
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发表时间：
2016-04-01
影响因子：
3.5
通讯作者：
Towrie, Michael
中科院分区：
文献类型：
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作者：
Greetham, Gregory M.;Donaldson, Paul M.;Towrie, Michael
提出了一种基于Yb：KGW激光介质的时间分辨多探针红外光谱系统。镱基技术和钛蓝宝石激光系统的时间分辨红外光谱测量之间的比较。100 kHz探测系统提供了时间分辨多探针实验的新功能，因为通过多探针在单个实验中从样品中获得更多信息。这种方法使用高重复率的探测脉冲重复测量光谱在10 μ s的时间间隔后，允许延长的时间尺度进行定期测量沿着与超快的数据激发。结果显示，分子动力学的测量超过10个数量级的时间尺度，到20毫秒，实验时间响应< 200 fs。通过对重复探针测量的主成分分析，探讨了多探针的功率，作为一种新的方法，用于去除噪声和测量伪影。
We present a dual-amplifier laser system for time-resolved multiple-probe infrared (IR) spectroscopy based on the ytterbium potassium gadolinium tungstate (Yb: KGW) laser medium. Comparisons are made between the ytterbiumbased technology and titanium sapphire laser systems for time-resolved IR spectroscopy measurements. The 100 kHz probing system provides new capability in time-resolved multiple-probe experiments, as more information is obtained from samples in a single experiment through multiple-probing. This method uses the high repetition-rate probe pulses to repeatedly measure spectra at 10 mu s intervals following excitation allowing extended timescales to be measured routinely along with ultrafast data. Results are presented showing the measurement of molecular dynamics over > 10 orders of magnitude in timescale, out to 20 ms, with an experimental time response of < 200 fs. The power of multiple-probing is explored through principal component analysis of repeating probe measurements as a novel method for removing noise and measurement artifacts.