FIBRE-LASER PUMPED DIAMOND RAMAN LASERS FOR LIDAR AND CLEAR PLASTICS WELDING

金刚石和光纤是一种天然的匹配，为高功率激光器提供了一个平台，使其进入迄今为止无法实现的参数范围，并为新的应用提供服务。虽然它的简单性很吸引人，但这一领域在很大程度上仍未被探索。在这里，我们提出了一种合作伙伴关系，通过对基础设备科学的仔细调查，实现高影响力的应用。这将导致光纤泵浦金刚石拉曼激光器的特性适合于激光雷达和透明塑料加工的应用。我们的目标是为这一点奠定基础，使其成为许多重要激光应用的首选方法。光纤激光器凭借其可靠性、低拥有成本、久经考验的性能和出色的功率可扩展性，成为从医学到材料加工的首选激光器。虽然中等的激光参数和标准波长足以满足许多应用，但更多的应用需要更好的光束质量，更窄的线宽，特定的波长或良好控制的高能脉冲-但仍然需要数百瓦的输出功率。光纤激光器很少能同时满足这些要求。在这个项目中，我们的目标是克服这些通用的限制，通过采用钻石转移光纤激光器进一步进入红外通过受激拉曼散射（SRS），同时亮度增强，并在脉冲的情况下，光谱变窄对transform-limit.The英国是建立在光纤激光器研究的世界领导者，并发挥了带头作用，率先使用钻石在拉曼激光器。光纤激光器和金刚石都被认为是超级功率可扩展的，这要归功于其上级光学和热性能。我们的方法将利用纤维系统的优势-效率，紧凑性和可靠性-同时修改其输出以更好地应对关键的工业挑战。虽然纤维和金刚石的组合是一个平台解决方案，可以解决各种波长特定的应用，特别是在近红外范围内，但在这个项目中，我们的目标是在两个对我们的工业合作伙伴很重要的领域证明这项技术。该提案将提供一种新型激光器，该激光器具有独特的功率，亮度，光谱纯度和波长组合能力，可用于LIDAR和透明塑料加工中的工业重要应用。

Diamond and fibre are a natural match that provides a platform to take high-power lasers into hitherto unattainable parameter regimes and to serve new applications. Though attractive in its simplicity, this area remains largely unexplored. Here, we propose a partnership that will enable high-impact applications through careful investigation of the underpinning device science. This will lead to fibre-pumped diamond Raman lasers with properties tailored to applications in LIDAR and clear plastics processing. We aim to lay the foundations for this to become the preferred approach for a number of important laser applications.Fibre lasers are the laser of choice from medicine to materials processing thanks to their reliability, low cost of ownership, proven performance, and outstanding power scalability. While moderate laser parameters and standard wavelengths suffice for many applications, many more require better beam quality, narrower linewidths, specific wavelengths, or well-controlled high-energy pulses - but still at hundreds of watts of output power. Fibre lasers can only rarely simultaneously satisfy these requirements. In this project, we aim to overcome these generic limitations of fibre sources by employing diamond to shift fibre lasers further into infrared via stimulated Raman scattering (SRS) with simultaneous brightness enhancement and, in the case of pulses, spectral narrowing towards the transform-limit.The UK is established as a world leader in fibre laser research and has played a leading role in pioneering the use of diamond in Raman lasers. Both fibre lasers and diamond are recognized as being superbly power scalable thanks to superior optical and thermal properties. Our approach will harness the advantages of fibre systems - efficiency, compactness, and reliability - while modifying their output to better address key industrial challenges. While the combination of fibre and diamond is a platform solution that can address a wide range of wavelength-specific applications, especially in the near IR range, in this project we aim to prove the technology in two areas that are important for our industrial partners. This proposal will deliver a new type of laser that is uniquely capable of the combination of power, brightness, spectral purity and wavelength required for industrially important applications in LIDAR and clear plastic processing.