Investigating the interaction between laser parameters for ultra-fast laser processing of glass

研究玻璃超快激光加工的激光参数之间的相互作用

• 批准号: 2123495
• 金额: --
• 依托单位: Heriot-Watt University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2123495
• 关键词: Investigating; interaction; between; laser; parameters

This is a PhD research project in Physics. The project aim is to produce an empirical model for ultra-short laser material modification of glass (and specifically fused silica and borosilicate). To accomplish this the student will need to:-Characterise the effect of the laser on the glass through a combination of post process analysis (e.g. SEM, microscopy and phase microscopy) and in situ diagnostics. -Characterisation will include measuring key features (such as fictive temperature barriers, residual stress and physical dimensions of the glass modification.-In-situ diagnostic tests are expected to include phase holography, temperature and absorption measurements. -Significant reduction in the number of experiments to be performed will be achieved through the application of experimental design processes developed for manufacturing/engineering processes. The Taguchi method has been tentatively identified as a suitable approach however the student will be expected to carry out a literature review which will include a survey of potential methods as the starting point for the project. With a combination of experimental design, characterisation and diagnostics the student will assess the impact of a range of parameters on the laser-material process. This will include but will not be limited to: peak pulse power, pulse energy, pulse duration, repetition rate, scan speed, pulse overlap average power and focussed spot size. It is expected that the student will identify further parameters over the course of the project. ANOVA (or other statistical approaches as identified as appropriate) can then be applied to reduce these data to an empirical model (equation) equating the "manufacturing" (i.e. laser material interaction) result to the input parameters. Ideally this would produce an equation allowing an operator to "dial in" an appropriate set of parameters for a desired result without the need for significant process development tests. The equipment required for these experiments will include the existing ps/fs laser processing systems (Trumpf Tru Micro, Light Coversion Carbide) as well as a new laser system which is in the process of being procured for installation in mid-2019. Characterisation work will be carried out using existing imaging systems (SEMS, Microscopes etc.) as well as a polariscopic which has been constructed for use in a related project. Diagnostic work will rely on a series of new instruments: A pyrometer will provide temperature data, an integration sphere absorption data and finally a holographic imaging system (Cambridge TechWorks, Falcon Camera) will provide in site phase information. To a large extent the student will be responsible for commissioning/adapting these equipment for use in this application.

这是物理学博士研究项目。该项目的目标是建立一个用于玻璃（特别是熔融石英和硼硅酸盐）超短激光材料改性的经验模型。为了实现这一目标，学生需要： - 通过后处理分析（例如 SEM、显微镜和相位显微镜）和原位诊断相结合来表征激光对玻璃的影响。 -表征将包括测量关键特征（例如虚拟温度屏障、残余应力和玻璃改性的物理尺寸）。 -原位诊断测试预计将包括相位全息术、温度和吸收测量。 -通过应用为制造/工程工艺开发的实验设计流程，将显着减少要进行的实验数量。田口方法已初步确定 然而，作为一种合适的方法，学生将需要进行文献综述，其中包括对潜在方法的调查，作为项目的起点。 通过实验设计、表征和诊断的结合，学生将评估一系列参数对激光材料工艺的影响。这将包括但不限于：峰值脉冲功率、脉冲能量、脉冲持续时间、重复率、扫描速度、脉冲重叠平均功率和聚焦光斑尺寸。预计 学生将在项目过程中确定更多参数。然后可以应用方差分析（或适当确定的其他统计方法）将这些数据简化为经验模型（方程），将“制造”（即激光材料相互作用）结果等同于输入参数。理想情况下，这将产生一个方程式，允许操作员“拨入”一组适当的参数以获得所需的结果，而无需进行大量的工艺开发测试。 这些实验所需的设备将包括现有的皮秒/飞秒激光加工系统（Trumpf Tru Micro、Light Coversion Carbide）以及正在采购并于 2019 年中期安装的新激光系统。表征工作将使用现有的成像系统（SEMS、显微镜等）以及为相关项目使用而构建的偏光镜进行。诊断工作将依赖于一系列 新仪器：高温计将提供温度数据、积分球吸收数据，最后全息成像系统（Cambridge TechWorks、Falcon Camera）将提供现场相位信息。在很大程度上，学生将负责调试/调整这些设备以用于此应用程序。