High power mid-infrared lasers

高功率中红外激光器

• 批准号: 2224782
• 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: 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-2224782
• 关键词: power; mid; infrared; lasers

There is increasing demand for high power laser sources emitting in the mid-infrared spectral region (3 micrometres - 5 micrometres) to serve the needs of a growing number of applications in areas such as laser processing of materials, medicine, sensing, defence and optical communications. Moreover, significant power scaling advantages can be gained by moving from traditional ytterbium-doped fibre lasers operating in the one-micron band to the two-micron band.The standard method of accessing the mid-infrared wavelength region is via nonlinear frequency conversion of near-infrared solid-state lasers. Unfortunately, this approach has a number of shortcomings as power levels are increased, due to the effects of waste heat generated in the laser medium, and, as a consequence, power levels are limited. This project will combine the power-scaling advantages of cladding-pumped thulium and holmium fibre lasers operating in the two-micron band with a number of novel nonlinear frequency conversion schemes to generate mid-infrared output at very high power levels in continuous-wave and pulsed operating regimes. If successful, this project will pave the way for a new generation of mid-infrared sources with flexibility in operating wavelength boasting levels of performance well beyond the current state-of-the-art.

对于在中红外光谱区域（3微米-5微米）发射的高功率激光源的需求日益增加，以满足诸如材料的激光加工、医学、传感、国防和光通信等领域中越来越多的应用的需求。此外，从传统的工作在1微米波段的掺镱光纤激光器到工作在2微米波段的掺镱光纤激光器，可以获得显著的功率缩放优势。进入中红外波长区域的标准方法是通过近红外固态激光器的非线性频率转换。不幸的是，由于激光介质中产生的废热的影响，随着功率水平的增加，这种方法具有许多缺点，并且因此，功率水平受到限制。该项目将结合联合收割机的功率缩放优势的包层泵浦的铥和钬光纤激光器在两微米波段与一些新颖的非线性频率转换计划，以产生中红外输出在非常高的功率水平在连续波和脉冲操作制度。如果成功，该项目将为新一代中红外光源铺平道路，该光源在工作波长方面具有灵活性，其性能水平远远超出当前最先进的水平。