Balakrishnan Gurusamy, Hu Ying, Nielsen Steen Brøndsted, Spiro Thomas G
Department of Chemistry, Princeton University, Princeton, New Jersey 08544, USA.
Appl Spectrosc. 2005 Jun;59(6):776-81. doi: 10.1366/0003702054280702.
The performance characteristics of a kilohertz solid-state laser source for ultraviolet Raman spectroscopy are described. Deep ultraviolet (UV) excitation in the 193-210 nm region is provided by mixing of the fundamental and third harmonics of a Ti-sapphire laser, which is pumped by the second harmonic of a Q-Switched Nd-YLF laser. The combination of tunability, narrow linewidth, high average power, good stability, and kilohertz repetition rate makes this laser suitable for deep UV resonance Raman applications. The short pulse duration (approximately 20 ns) permits nanosecond time resolution in pump-probe applications. The low peak power and high data rate provide artifact-free spectra with a high signal-to-noise ratio. UV Raman cross-section and Raman excitation profiles are reported for gaseous O2 (relative to N), aqueous ClO4-, tyrosine, phenylalanine, tryptophan, histidine, and hemoglobin excited between 193 nm and 210 nm to illustrate laser performance.
描述了用于紫外拉曼光谱的千赫兹固态激光源的性能特征。通过调Q钕钇锂氟激光器的二次谐波泵浦钛宝石激光器的基波和三次谐波混合，可在193 - 210 nm区域提供深紫外（UV）激发。可调谐性、窄线宽、高平均功率、良好稳定性和千赫兹重复率的组合，使得这种激光器适用于深紫外共振拉曼应用。短脉冲持续时间（约20 ns）允许在泵浦 - 探测应用中实现纳秒级时间分辨率。低峰值功率和高数据速率提供了具有高信噪比且无伪像的光谱。报道了在193 nm至210 nm之间激发的气态O2（相对于N）、高氯酸根离子水溶液、酪氨酸、苯丙氨酸、色氨酸、组氨酸和血红蛋白的紫外拉曼截面和拉曼激发轮廓，以说明激光性能。
