Optical metrology using optical frequency combs and hollow core fibres

光学频率梳通过将光学和RF频率基准相关联而彻底改变了光学计量学。光纤能够比较光学参考，补充光学频率梳。然而，它们的损害，如色散，非线性，以及累积相位和延迟的温度和湿度的敏感性，可能会导致显着退化的准确的时间/频率信号。光电子研究中心开发和制造的空芯光纤大大减少了这些损害。博士工作将研究空芯光纤用于时间和频率传输的机会，以及使用它们来取代光学腔。它还将研究如何抽空空芯光纤可能有利于时间和频率计量。

Optical frequency combs have revolutionized optical metrology by relating optical and RF frequency references. Optical fibres enable comparison of optical references, complementing optical frequency combs. However, their impairments such as chromatic dispersion, nonlinearity, and sensitivity of accumulated phase and delay with temperature and moisture may cause significant degradation to the accurate time/frequency signals. Hollow core fibres developed and manufactured in the Optoelectronics Research Centre have these impairments significantly reduced. The PhD work will be researching opportunities of hollow core fibres for time and frequency transfer as well as using them to replace optical cavities. It will also investigate how evacuating of hollow core fibres may benefit in time and frequency metrology.