Development of multi-kW Coherently Combined Fibre Master Oscillator Power Amplifiers

多千瓦相干组合光纤主振荡器功率放大器的开发

• 批准号: 2607889
• 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: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2607889
• 关键词: Development; multi; kW; Coherently; Combined

Development of Yb fibre Master Oscillator Power Amplifiers (MOPAs) is proposed, to enable power scaling from multi-kW to greater than 20 kW in coherently combined laser beam arrays. This aligns with a Leonardo strategic plan to deliver novel and robust laser technology for a range of defense applications. Achieving the highest irradiance on target will be underpinned by the development and demonstration of kW-level fibre MOPAs, at 1m wavelength, with the highest efficiency and tightest control of laser parameters affecting spatial and temporal coherence.State of the art techniques for passive and active phase control under a wide range of environmental conditions will be a key theme of the work, laying the foundations for combining large numbers of fibre MOPAs (N > 10) in an eventual system which is robust against extreme environmental conditions. Further to this, the work will include scope for the development of advanced, phase sensing and adaptive control via the application of neural networks. Packaging of fibre MOPAs is also of importance for optimum amplifier performance and so advanced manufacturing and assembly techniques are proposed, supported by high-power fibre laser modelling and simulation.The project will advance state-of-the-art fibre amplifiers to multi-kW levels of power with the highest efficiency. Novelty is embedded within the project by the application of the latest fibre components, sensing and metrology techniques available within Leonardo and Heriot-Watt University. The amplifiers will exploit the latest advanced packaging methods and one example is the use of glass-to-metal bonding of fibre-collimated beam delivery assemblies, as developed at Heriot Watt University. The proposal includes a new application for neural networks within state-of-the-art coherently combined laser systems.

提出了一种Yb光纤主振荡器功率放大器(MOPA)的研制方案，使相干合成激光阵列的功率从多kW扩展到20kW以上。这与莱昂纳多的战略计划相一致，该战略计划为一系列国防应用提供新颖而强大的激光技术。实现对目标的最高辐照度将被1M波长千瓦级光纤MOPA的开发和演示所支持，该光纤MOPA具有最高的效率和对影响空间和时间一致性的激光参数的最严格控制。在广泛的环境条件下的被动和主动相位控制技术将是这项工作的关键主题，为将大量光纤MOPA(N&gt；10)组合在一个最终系统中奠定基础，该系统对极端环境条件具有健壮性。此外，这项工作将包括通过应用神经网络来开发先进的相位传感和自适应控制的范围。光纤MOPA的封装对于优化放大器的性能也很重要，因此在高功率光纤激光器建模和模拟的支持下，提出了先进的制造和组装技术。该项目将以最高的效率将最先进的光纤放大器提升到多千瓦的功率水平。通过应用莱昂纳多和赫里奥特-瓦特大学提供的最新纤维组件、传感和计量技术，项目中嵌入了新颖性。放大器将利用最新的先进封装方法，其中一个例子是使用玻璃与金属粘合光纤准直光束传输组件，如Heriot Watt大学开发的。该提案包括神经网络在最先进的相干组合激光系统中的新应用。