Optical metrology using optical frequency combs and hollow core fibres

光学频率梳通过将光学频率基准与RF频率基准相关联，使光学计量发生了革命性的变化。光纤可以比较光学参考，补充光学频率梳。然而，它们的损伤，如色散、非线性、累积相位的灵敏度以及随温度和湿度的延迟，可能会导致准确的时间/频率信号的显著劣化。在光电子研究中心开发和制造的中空纤芯纤维大大减少了这些损害。博士的工作将是研究空芯光纤在时间和频率转移方面的机会，以及用它们来取代光腔。它还将调查空芯纤维的疏散如何在时间和频率计量方面受益。

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.