MRI: Acquisition of a High-Pulse-Energy Ultrafast Laser System for Interdisciplinary Research

0922987Lucht“该奖项是根据2009年美国复苏和再投资法案（公法111-5）资助的。”要求为购买用于非线性光谱的先进超快激光系统提供资金。指定的系统是一个光谱物理喷火Pro 40F-5W超快激光系统。系统基本输出的脉冲长度为40飞秒（fs）。该系统可以在两种不同的重复频率下工作，1khz或5khz。在重复频率为5 kHz时，输出脉冲能量为1 mJ；重复频率为1khz时，输出脉冲能量为5mJ。还要求一种基于多光子脉冲内干涉相位扫描（MIIPS）的最先进的脉冲整形器。MIIPS脉冲整形器对于傅里叶变换限制脉冲的相位校正或使用输入相位函数进行精确相位整形非常有用。该超快激光系统用户设施将为广泛的跨学科研究提供资源。目前在普渡大学还没有类似的激光系统。因此，普渡大学的研究人员在提出诸如飞秒激光诊断应用、x射线产生和阿秒光谱学等新兴领域的研究时处于严重劣势。提出了新的激光系统在生物医学光谱、湍流反应流诊断、固体相干声子光谱、质子结构研究的多光子光谱、软x射线产生和阿秒光谱等方面的应用。

0922987Lucht"This award is funded under the American Recovery and Reinvestment Act of 2009 (Public Law 111-5)."Funds for the purchase of an advanced ultrafast laser system for nonlinear spectroscopy are requested. The system that specified is a Spectra-Physics Spitfire Pro 40F-5W ultrafast laser system. The pulse length of the fundamental output of the system is 40 femtoseconds (fs). The system can be operated at two different repetition rates, 1 kHz or 5 kHz. At the repetition rate of 5 kHz, the output pulse energy is 1 mJ; for the repetition rate of 1 kHz, the output pulse energy is 5mJ. A state-of-the-art pulse shaper based on multiphoton intrapulse interference phase scan (MIIPS) is also requested. The MIIPS pulse shaper will be very useful for phase correction of Fourier-transform-limited pulses or for accurate phase-shaping using input phase functions. This ultrafast laser system user facility will be a resource for a wide range of interdisciplinary research. At present there is no comparable laser system at Purdue University. Consequently Purdue researchers are at a serious disadvantage in proposing research in emerging new fields such as diagnostic applications of femtosecond lasers, X-ray generation, and attosecond spectroscopy. Applications of the new laser system are proposed in biomedical spectroscopy, diagnostics in turbulent reacting flows, coherent phonon spectroscopy in the solid state, multiphoton spectroscopy for proton structure studies, soft X-ray generation, and attosecond spectroscopy.