Advanced fibre Bragg grating fabrication with applications in astrophysics

天文学中有一个长期存在的关键瓶颈，这限制了观测早期宇宙和来自遥远星系的星光的可能性。主要的限制是由大量非常窄的羟基发射灯形成的明亮的红外夜空。滤除不需要的大气谱线的解决方案之一是使用多通道光纤布拉格光栅(FBG)，在数百nm的光谱窗口内具有20-30分贝的抑制因子。拟开展的PHD研究的主要目标是基于原有和新的建模方法的组合以及最近在阿斯顿大学提出的先进的快速反馈光纤光栅写入技术来开发制造此类FBG的新方法。该博士生将参与设计和制造先进的FBG，应用于天体物理和其他相关领域。该项目的第二个目标是研究一种新的免费方法-在多芯光纤中写入光栅，用于天体物理仪器中的光子灯。这项技术在传感和医疗保健应用方面具有很高的独立价值。

There is a long-standing critical bottleneck in astronomy, which limits the possibility of observations of the early Universe and starlight from distant galaxies. The main restrictions are imposed by bright infrared night sky formed by a large number of very narrow hydroxyl emission lights. One of the solutions for filtering of unwanted atmospheric lines is to use multichannel fibre Bragg gratings (FBGs) with suppression factors of 20-30 dB over the spectral window of hundreds nm. The main goal of the proposed PhD research is to develop novel approaches to fabrication of such FBGs based on a combination of original and new modelling methods and the advanced fast feedback fibre grating writing technique, recently proposed at Aston University. The PhD student will be involved in design and fabrication of advanced FBGs with application in astrophysics and other relevant areas. The second goal of the project is to study a new complimentary approach - writing gratings in multi-core fibres for use in photonics lanterns in astrophysics instrumentation. This technology has high independent value for sensing and medical and healthcare applications.