Tu Huilan, Liu Jia, Dai Xiangyang, Weng Haizhong, Li Nanguo, Li Guojiong, Lu Qiaoyin, Huang Lirong, Donegan John, Guo Weihua
Opt Express. 2025 Mar 24;33(6):13401-13412. doi: 10.1364/OE.554042.
The electro-optic frequency comb (EOFC) has significant applications in fields such as spectroscopy, optical communications, high-precision measurements, and quantum technology, offering a flexible free spectral range (FSR) and stable spectral characteristics. Practical implementation of the EOFC requires high power and flattened comb teeth, which depend highly on optical losses and microwave modulation strength. In this work, we propose the integration of short-circuit electrodes to form a microwave resonant cavity, thereby enhancing the microwave modulation strength. The maximum modulation enhancement factor was measured to be 2.77 at approximately 20 GHz. Furthermore, the spectral bandwidth of the electrical-resonator-enhanced electro-optic frequency comb (ERE-EOFC) generator was 71 nm, 1.7 times broader than that of a generator without resonant electrodes.
电光频率梳（EOFC）在光谱学、光通信、高精度测量和量子技术等领域有着重要应用，具有灵活的自由光谱范围（FSR）和稳定的光谱特性。EOFC的实际应用需要高功率和平坦的梳齿，这在很大程度上取决于光学损耗和微波调制强度。在这项工作中，我们提出集成短路电极以形成微波谐振腔，从而增强微波调制强度。在约20GHz处测得的最大调制增强因子为2.77。此外，电谐振器增强型电光频率梳（ERE-EOFC）发生器的光谱带宽为71nm，比没有谐振电极的发生器宽1.7倍。
