Central Laser Facility, Research Complex at Harwell, Science and Technology Facilities Council, Rutherford Appleton Laboratory, Harwell Science and Innovation Campus, Didcot, Oxfordshire, OX11 0QX, UK.
Appl Spectrosc. 2010 Dec;64(12):1311-9. doi: 10.1366/000370210793561673.
We report the development of a high-sensitivity time-resolved infrared and Raman spectrometer with exceptional experimental flexibility based on a 10-kHz synchronized dual-arm femtosecond and picosecond laser system. Ultrafast high-average-power titanium sapphire lasers and optical parametric amplifiers provide wavelength tuning from the ultraviolet (UV) to the mid-infrared region. Customized silicon, indium gallium arsenide, and mercury cadmium telluride linear array detectors are provided to monitor the probe laser intensity in the UV to mid-infrared wavelength range capable of measuring changes in sample absorbance of ΔOD ~ 10(-5) in 1 second. The system performance is demonstrated for the time-resolved infrared, two-dimensional (2D) infrared, and femtosecond stimulated Raman spectroscopy techniques with organometallic intermediates, organic excited states, and the dynamics of the tertiary structure of DNA.
我们报告了一种基于 10kHz 同步双臂飞秒和皮秒激光系统的高灵敏度时间分辨红外和拉曼光谱仪的开发，该光谱仪具有出色的实验灵活性。超快高平均功率钛蓝宝石激光器和光参量放大器提供从紫外（UV）到中红外区域的波长调谐。提供定制的硅、砷化铟镓和碲化汞镉线性阵列探测器，以监测紫外到中红外波长范围内的探针激光强度，能够在 1 秒内测量样品吸光度变化 ΔOD~10(-5)。该系统的性能通过时间分辨红外、二维（2D）红外和飞秒受激拉曼光谱技术得到了演示，用于研究有机金属中间体、有机激发态以及 DNA 三级结构的动力学。
