New generation rare-earth doped silica optical fibres for high-power lasers

光纤激光器正日益成为广泛的工业和科学应用的光源选择，这刺激了新型稀土（即镱、铒、铥和钬）掺杂光纤的发展，每种光纤都有一套独特的特性来匹配特定的应用。由于光纤的设计和纤芯的材料性能对光纤激光器的性能至关重要，因此需要一种比目前工业标准工艺更强大的光纤制造工艺，即改性化学气相沉积-溶液掺杂技术。在这个博士项目中，我们将开发新型光纤材料和制造技术，以实现具有定制掺杂物轮廓和大芯的先进稀土掺杂光纤，这是下一代高功率光纤激光器和放大器所需要的。此外，将进行稀土掺杂光纤的光谱表征和高功率激光器和放大器的实现，以指导新一代高功率光纤的发展。

Fibre lasers that are increasingly becoming the light source of choice for a wide range of industrial and scientific applications have spurred the development of new types of rare-earth (i.e., Yb, Er, Tm, and Ho) doped fibres, each with a unique set of properties to match with the specific applications. Since the fibre designs and material properties of the fibre core have become critical to the performance of the fibre lasers, a more powerful fibre fabrication process is required than the current industry standard process, which is MCVD (Modified Chemical Vapour Deposition) - solution doping technique. In this PhD project, we will develop novel optical fibre materials and fabrication techniques for the realisation of advanced rare-earth doped fibres with tailored dopant profiles and large core, as required for the next generation of high power fibre lasers and amplifiers. In addition, the spectroscopic characterisation of rare-earth doped fibres and realisation of high power lasers and amplifiers will be undertaken to guide the development of the new generation of high power fibres.