Dynamics of Femtosecond-Laser Modification of Glass
玻璃飞秒激光改性动力学
基本信息
- 批准号:0801786
- 负责人:
- 金额:$ 52万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2008
- 资助国家:美国
- 起止时间:2008-06-15 至 2013-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
NON-TECHNICAL DESCRIPTION: Ultra-short pulse (femtosecond) laser structuring of glass is becoming increasingly important as a novel fabrication method to modify the properties of glass with three-dimensional spatial selectivity. Despite the fact that this technique has already been used for the fabrication of a variety of passive and active optical devices and lab-on-chip components, little is known about the processes by which the absorbed laser energy gets dissipated into the glass, thereby causing the structural changes. The objective of this project is to experimentally monitor the dynamics of femtosecond-laser modification in fused silica to gain a better understanding of the mechanisms involved and to determine how these depend on laser writing parameters. Highly trained graduate and undergraduate students will be the resources generated by the research in a cross-disciplinary setting. This project will offer them a unique opportunity by providing hands-on experience with state-of-the-art optical and materials characterization techniques.TECHNICAL DETAILS: The focus of the proposed research is to experimentally monitor the dynamics of femtosecond-laser modification in fused silica to gain a better understanding of the process. This is done by employing a number of different femtosecond-laser pump-probe experiments. In the first set of experiments the initial (peak) electron density resulting from the absorption of the femtosecond-laser pulse is determined as well as its dependence on laser-writing parameters such as laser wavelength, pulse energy, pulse duration and focusing conditions. The second set of experiments involves measuring the time evolution of the electron density. Once the electron density (or plasma) has decayed a hot liquid results, which then cools leaving the permanent modification. Time-dependent Raman measurements are used to probe the temperature of the hot liquid as a function of time until it has cooled completely. These experiments give important information about the mechanisms responsible for femtosecond-laser modification in glass. The findings have a major impact on the potential commercialization of this technique for optical device fabrication. This project involves foreign students and visitors through exchange programs provided by the NSF-International Materials Institute for New Functionality in Glass.
非技术描述:超短脉冲(飞秒)激光玻璃结构化作为一种新的制造方法以改变具有三维空间选择性的玻璃的性质变得越来越重要。尽管这种技术已经被用于制造各种无源和有源光学器件以及芯片实验室组件,但人们对吸收的激光能量消散到玻璃中从而导致结构变化的过程知之甚少。该项目的目的是通过实验监测飞秒激光在熔融石英中的改性动力学,以更好地了解所涉及的机制,并确定这些机制如何取决于激光写入参数。训练有素的研究生和本科生将是跨学科环境中研究产生的资源。该项目将为他们提供一个独特的机会,通过提供最先进的光学和材料表征技术的实践经验。技术支持:拟议研究的重点是实验监测飞秒激光在熔融石英中的改性动力学,以更好地了解该过程。这是通过采用一些不同的飞秒激光泵浦探测实验。在第一组实验的初始(峰值)的飞秒激光脉冲的吸收所产生的电子密度被确定,以及其依赖于激光写入参数,如激光波长,脉冲能量,脉冲持续时间和聚焦条件。第二组实验涉及测量电子密度的时间演化。一旦电子密度(或等离子体)衰减,就会产生热的液体,然后冷却,留下永久的改性。时间相关的拉曼测量用于探测热液体的温度作为时间的函数,直到其完全冷却。这些实验提供了有关飞秒激光在玻璃中改性的机制的重要信息。这些发现对这种技术用于光学器件制造的潜在商业化产生了重大影响。该项目通过NSF-国际玻璃新功能材料研究所提供的交流项目吸引外国学生和游客。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Denise Krol其他文献
Denise Krol的其他文献
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{{ truncateString('Denise Krol', 18)}}的其他基金
Collaborative Research: Designing Glass Structures for Femtosecond Laser Processing
合作研究:设计用于飞秒激光加工的玻璃结构
- 批准号:
1206979 - 财政年份:2012
- 资助金额:
$ 52万 - 项目类别:
Standard Grant
Femtosecond-Laser Processing of Hybrid Micro- and Nano-Structures in Glass
玻璃中混合微纳米结构的飞秒激光加工
- 批准号:
0825572 - 财政年份:2008
- 资助金额:
$ 52万 - 项目类别:
Standard Grant
Role of Glass Composition in Waveguide Fabrication with Femtosecond Laser Pulses
玻璃组合物在飞秒激光脉冲波导制造中的作用
- 批准号:
0307002 - 财政年份:2003
- 资助金额:
$ 52万 - 项目类别:
Continuing Grant
Fabrication and Characterization of Integrated Waveguide Laser Devices
集成波导激光器件的制造和表征
- 批准号:
0083087 - 财政年份:2000
- 资助金额:
$ 52万 - 项目类别:
Standard Grant
Optical Coherence Studies of Rare Earth Doped Glasses (Chemistry)
稀土掺杂玻璃的光学相干性研究(化学)
- 批准号:
9450098 - 财政年份:1994
- 资助金额:
$ 52万 - 项目类别:
Standard Grant
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