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).

该项目将研究一种新的方法，用于在可见光波长范围内从光纤激光器产生非常高的连续波输出功率，其目标是在功率、效率和波长灵活性方面展示远远超出当前最先进技术能力的性能水平。这项工作的主要动机是基于激光的制造业日益增长的需求，特别是增材制造（3D打印），用于可见波段的高功率激光源，这是由于在重要金属（例如铜）中显著更大的吸收。该方法是基于使用一种新的方案，内部非线性频率转换，可以与激光器（如包层泵浦光纤激光器），具有显着的（即不可忽略的）腔损耗，而不会间接影响性能。其目的是表明，该方案是兼容的千瓦级发电的绿色，它提供了灵活性，以解决在可见光波段的其他波长的高功率水平的需求。性能的提高将直接有益于激光制造中的应用，其中可见波长处的增强吸收至关重要，以及许多其他应用（例如生物医学成像，DNA测序，光学泵浦，显示技术）。