Novel Concepts in Astrocomb Creation, Stabilization and Metrology

该项目将利用Ti：蓝宝石光学频率梳探索天文梳创建、稳定和计量方面的新概念。主要目标包括：基于dmd镜的天文梳操作方案的开发，用于校准天文光谱仪的单梳模式的隔离/测量，被动法布里-珀罗滤波器腔的评估，包括使用热导向键合法布里-珀罗腔来过滤更小的模式间隔梳。包括庞德-德雷弗霍尔锁定在内的技术可用于确保长期锁定。连续波激光器用于腔锁定的评价及其集成到Ti：蓝宝石梳中。将这些技术扩展到其他波长，例如使用OPO频率转换。这项工作是赫瑞瓦特小组为ELT望远镜开发天文梳的更广泛努力的一部分。因此，工作方案的某些部分有时可能与研究小组的其他成员合作进行。

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.