Laboratory of Ultrafast Spectroscopy, EPFL, CH-1015 Lausanne, Switzerland.
Opt Lett. 2012 Jun 15;37(12):2337-9. doi: 10.1364/OL.37.002337.
We present a broadband two-dimensional transient absorption setup for the UV around 300 nm with a time resolution of 150 fs. A narrowband, frequency tunable pump pulse and a broadband probe pulse are generated from the output of a noncollinear optical parametric amplifier operated at 20 kHz repetition rate and combined in a spectrally resolved transient absorption experiment. The high repetition rate and low noise of the setup allow us to acquire high quality two-dimensional data as a function of time delay with an unsurpassed frequency window of 10,000 and 8000 cm(-1) along the probe and pump axis, respectively. The performance of the setup is demonstrated on 2,5-Diphenyloxazol dissolved in cyclohexane.
我们提出了一种用于 UV 波段（约 300nm）的二维宽带瞬态吸收装置，其时间分辨率为 150fs。一个窄带、频率可调谐的泵浦脉冲和一个宽带探测脉冲是由工作在 20kHz 重复率的非共线光参量放大器的输出产生的，并在光谱分辨的瞬态吸收实验中组合在一起。该装置的高重复率和低噪声使得我们能够以时间延迟为函数获取高质量的二维数据，在探测和泵浦轴上的频率窗口分别为 10000 和 8000cm-1。该装置的性能在环己烷中的 2,5-二苯基恶唑的溶解中得到了验证。
