Wang Xiao, Feng Lishuang, Zhou Zhen, Li Hui, Liu Danni, Wang Qiwei, Liu Liying, Jia Yongze, Jiao Hongchen, Liu Ning
Opt Express. 2018 Mar 19;26(6):7494-7506. doi: 10.1364/OE.26.007494.
We demonstrate a real-time scheme for measuring the free spectral range (FSR) of a high-aspect-ratio SiN waveguide ring resonator with a fiber-based hybrid unbalanced Mach-Zehnder modulator (MZM) using an optical single-sideband technique. Resonance-tracking loops were established with the Pound-Drever-Hall technique for locking resonance modes. A relative precision of 3.25 × 10 was achieved for a 35-mm waveguide ring resonator with FSR = 1,844,628 kHz and Q = 3.211 × 10. Furthermore, the SiN resonator FSR coefficient of thermal expansion was measured as -16.735±0.002 kHz/°C. This method will provide a flexible photonic interface for realizing advanced photonic systems.
我们展示了一种实时方案，该方案利用基于光纤的混合不平衡马赫-曾德尔调制器（MZM）并采用光学单边带技术来测量高纵横比氮化硅波导环形谐振器的自由光谱范围（FSR）。利用庞德-德瑞弗-霍尔技术建立了共振跟踪环路以锁定共振模式。对于一个FSR = 1,844,628 kHz且Q = 3.211×10的35毫米波导环形谐振器，实现了3.25×10的相对精度。此外，测得氮化硅谐振器的热膨胀FSR系数为-16.735±0.002 kHz/°C。该方法将为实现先进光子系统提供一个灵活的光子接口。
