Development of a Multibeam, Parabolic Pulse, Kilohertz Terawatt Laser Facility for Ultrafast Optical Physics

开发用于超快光学物理的多光束、抛物线脉冲、千赫兹太瓦激光设备

• 批准号: 0420357
• 负责人: Jeffrey Squier
• 金额: --
• 依托单位: Colorado School of Mines
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2008-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0420357&HistoricalAwards=false
• 关键词: Development; Multibeam; Parabolic; Pulse; Kilohertz

This MRI award provides for the construction of a multibeam TeraWatt kilohertz laser system at the Colorado School of Mines. Parabolic pulses from a Ti:sapphire oscillator will be used as the seed for a unique, multibeam TeraWatt kilohertz laser. Using adaptive optics, focused intensities on the order of ten to the power 20 Watts per square centimeter can be achieved with this system. A broad array of available frequency conversion optics makes it possible for this laser source to generate radiation that spans from the x-ray regime to the mid-infrared. This TeraWatt kilohertz laser facility will form the basis of a universal light source that will be used by multiple departments on the Colorado School of Mines (CSM) campus and will enable interdisciplinary programs in optical, atomic and nuclear physics, chemistry, metallurgy, and biology.The laser facility will feature two beamlines: a 1mJ, 20 fs, 1 kHz beamline, and a 20 mJ, 20 fs, 1 kHz beamline. Each line can be manipulated independently (in wavelength, pulse duration, and intensity) making it possible to simultaneously drive a large number of experiments at low and high intensities. Scientific applications for the low energy arm include generating mid-IR pulses to be used for surface vibrational sum-frequency spectroscopy (SVSFG). Through the special sensitivity of SVSFG we expect dramatic progress in the understanding of systems across a broad range of applications such as: chemical mechanisms of self-assembly of covalently attached molecular monolayers, energy dissipation mechanisms in nano-lubrication, photochemical degradation mechanisms of polymeric materials, bio-specific surface attachment for implant compatibility, fundamental mechanisms of liquid crystal dynamics at interfaces, and primary processes in adhesion. Scientific applications for the high energy arm include the efficient generation of ultrafast x-rays for medical imaging, ultrafast x-ray absorption (EXAFS) and diffractive studies in solid-state materials and complex molecules.

该MRI合同用于在科罗拉多矿业学院建造多束太瓦千赫激光系统。 来自钛宝石振荡器的抛物脉冲将被用作独特的多光束太瓦千赫激光器的种子。使用自适应光学，可以用该系统实现每平方厘米10的20瓦的聚焦强度。广泛的可用频率转换光学器件阵列使得该激光源能够产生从X射线区域到中红外的辐射。这台太瓦千赫激光设备将成为通用光源的基础，该光源将被科罗拉多矿业学院（CSM）校园的多个部门使用，并将实现光学、原子和核物理、化学、冶金和生物学等跨学科课程。该激光设备将具有两条光束线：1mJ、20 fs、1 kHz束线和20 mJ、20 fs、1 kHz束线。每条线都可以独立操作（波长，脉冲持续时间和强度），从而可以在低强度和高强度下同时驱动大量实验。 低能臂的科学应用包括产生用于表面振动和频光谱（SVSFG）的中红外脉冲。通过SVSFG的特殊敏感性，我们预计在广泛的应用中对系统的理解将取得巨大进展，例如：共价连接的分子单层的自组装的化学机制，纳米润滑中的能量耗散机制，聚合物材料的光化学降解机制，用于植入物相容性的生物特异性表面连接，界面处液晶动力学的基本机制，和粘附的主要过程。 高能臂的科学应用包括高效生成用于医学成像的超快X射线、超快X射线吸收（EXAFS）以及固态材料和复杂分子的衍射研究。