Novel Concepts in Astrocomb Creation, Stabilization and Metrology

该项目将探索使用钛蓝宝石光学频率梳在星梳创建、稳定和计量方面的新概念。主要目标包括：开发利用DMD反射镜操纵天体梳子的计划，为校准天文光谱仪的目的隔离/测量单梳模式，评估无源法布里-珀罗滤波腔，包括使用热引导粘合法布里-珀罗腔对较小模间距的梳子进行滤波。可以使用包括庞德-德雷弗霍尔锁定在内的技术来确保长期锁定。连续激光锁腔及其集成到钛宝石梳子中的评价。将这些技术扩展到其他波长，例如使用OPO频率转换。这项工作是赫里奥特-瓦特小组为ELT望远镜开发天文梳子的更广泛努力的一部分。因此，工作方案的某些部分有时可以与研究小组的其他成员协作进行。

This project will explore new concepts in astrocomb creation, stabilization and metrology using a Ti:sapphire-based optical frequency comb. Key targets include:the development of DMD-mirror based schemes for manipulating astrocombs, and isolating / measuring a single comb modes for the purpose of calibrating an astronomical spectrograph, the evaluation of passive Fabry-Perot filter cavities, including the use of thermally-steered bonded Fabry-Perot cavities to filter a smaller-mode-spacing comb. Techniques including Pound-Drever Hall locking may be used to ensure long-term locking. the evaluation of cw lasers for cavity locking and their integration into a Ti:sapphire comb. the extension of these techniques to other wavelengths, for example using OPO frequency conversion. This work forms part of a wider effort in the Heriot-Watt group to develop an astrocomb for the ELT telescope. Some parts of the work programme may therefore at times be conducted collaboratively with other members of the research group.