Advanced fibre Bragg grating fabrication with applications in astrophysics

在天文学中有一个长期存在的关键瓶颈，它限制了对早期宇宙和遥远星系星光的观测的可能性。主要的限制是由明亮的红外夜空形成的大量非常狭窄的羟基发射灯。用于过滤不需要的大气线的解决方案之一是使用多通道光纤布拉格光栅（FBG），其在数百nm的光谱窗口上具有20-30 dB的抑制因子。拟议的博士研究的主要目标是开发新的方法来制造这样的FBG的基础上的组合的原始和新的建模方法和先进的快速反馈光纤光栅写入技术，最近在阿斯顿大学提出。博士生将参与设计和制造先进的FBG与应用在天体物理学和其他相关领域。该项目的第二个目标是研究一种新的补充方法-在多芯光纤中写入光栅，用于天体物理仪器中的光子灯。该技术对于传感和医疗保健应用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.