Optical metrology using optical frequency combs and hollow core fibres

光学频率梳通过将光学和射频频率参考相关联，彻底改变了光学计量学。光纤可以比较光学参考，补充光学频率梳。然而，它们的色散、非线性以及累积相位和延迟随温度和湿度的敏感性等缺陷可能会导致精确时频信号的严重退化。光电子研究中心开发和制造的空心芯纤维大大减少了这些损伤。博士的工作将是研究空芯光纤在时间和频率传输方面的机会，以及用它们来取代光学腔。它还将研究如何疏散中空芯纤维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.