Dispersive-wave-agile optical frequency division

The remarkable frequency stability of resonant systems in the optical domain (optical cavities and atomic transitions) can be harnessed at frequency scales accessible by electronics using optical frequency division. This capability is revolutionizing technologies spanning time keeping to high-performance electrical signal sources. A version of the technique called 2-point optical frequency division (2P-OFD) is proving advantageous for application to high-performance signal sources. In 2P-OFD, an optical cavity anchors two spectral endpoints defined by lines of a frequency comb. The comb need not be self-referenced, which greatly simplifies the system architecture and reduces power requirements. Here, a 2P-OFD microwave signal source is demonstrated with record-low phase noise using a microcomb. Key to this advance is a spectral endpoint defined by a frequency agile singlemode dispersive wave that is emitted by the microcomb soliton. Moreover, the system frequency reference is a compact all-solid-state optical cavity with a record Q-factor. The results advance integrable microcomb-based signal sources into the performance realm of much larger microwave sources.

搜集汇总

背景与挑战

背景概述

该数据集聚焦于光学频率分频技术，特别是2点光学频率分频（2P-OFD），通过微梳实现了创纪录低相位噪声的微波信号源。关键技术突破包括利用微梳孤子产生的频率灵活单模色散波作为光谱端点，以及采用高Q因子的紧凑全固态光学腔作为频率参考，推动了可集成微梳信号源性能向更大微波源领域迈进。