Investigation of techniques for nonlinear frequency conversion of high power fibre lasers to the visible wavelength band

高功率光纤激光器非线性频率转换到可见光波段的技术研究

• 批准号: 2278614
• 金额: --
• 依托单位: University of Southampton
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2278614
• 关键词: Investigation; techniques; nonlinear; frequency; conversion

This project will investigate a new approach for generating very high continuous-wave output power from fibre lasers in the visible wavelength regime with the ambition of demonstrating levels of performance in terms of power, efficiency and wavelength flexibility that go well beyond the capabilities of the current state-of-the-art. The work is motivated mainly by the growing demands of laser-based manufacturing, and particularly additive manufacturing (3D printing), for high power laser sources in the visible band due to significantly greater absorption in important metals, such as copper. The approach is based on the use of a novel scheme for internal nonlinear frequency conversion that can be used with lasers (such as cladding-pumped fibre lasers) that have significant (i.e. non-negligible) cavity losses without detrimentally affecting the performance. The aim is to show that this scheme is compatible with kilowatt-class power generation in the green and that it offers the flexibility to address the needs for high power levels at other wavelengths in the visible band. The improved performance will directly benefit applications in laser-based manufacturing where enhanced absorption at visible wavelengths is crucial, as well as many other applications (e.g. bio-medical imaging, DNA sequencing, optical pumping, display technologies).

该项目将调查一种新方法，以在可见的波长状态下从光纤激光器中产生很高的连续波输出功率，并具有在功率，效率和波长灵活性方面展示性能水平的雄心，远远超出了当前最新目前的最新能力。这项工作主要是由于基于激光的制造（尤其是添加剂制造（3D打印））对可见频段中高功率激光源的需求不断增长，这是由于重要金属（如铜）的吸收而大大吸收。该方法是基于对内部非线性频率转换的新方案的使用，该方案可与激光器（例如覆盖式纤维激光器）一起使用，这些激光器具有明显的（即不可忽略的）腔损失而不会降低性能。目的是表明该方案与绿色的千瓦级发电量兼容，并且具有灵活性，可以满足可见频段其他波长的高功率水平的需求。改进的性能将直接受益于基于激光的制造的应用，在激光制造中，可见波长的吸收增强至关重要，以及许多其他应用（例如，生物医学成像，DNA测序，光学泵送，显示技术）。