近日，北京大学杨起帆团队报道了谐振耦合微谐振器中的高能效超宽带孤子微梳。该项研究成果发表在2026年3月30日出版的《光：科学与应用》杂志上。

为实现光学频率梳的小型化实用部署，微谐振腔孤子作为一种有前景的芯片级方案备受关注。然而，这类孤子微梳在增加光谱宽度时，尤其是在精细梳齿间距条件下，会消耗极高的泵浦功率。因此，要在微波重复频率下实现倍频程跨度的梳状谱以建立光-微波直接连接，传统上认为由于高功率需求而无法在光子集成中实现。

研究组引入谐振耦合至孤子微梳的概念，以显著降低泵浦功耗。与传统波导耦合设计相比，他们展示了：（i）高功率微梳的光谱跨度提升三倍；（ii）倍频程跨度的微梳重复频率降低多达十倍。该构型与激光器集成兼容，并可实现可靠的一键式孤子产生。通过消除长期存在的泵浦功率瓶颈，微梳将很快可用于便携式光学原子钟、大规模并行数据链路以及现场可部署的光谱仪。

附：英文原文

Title: Power-efficient ultra-broadband soliton microcombs in resonantly-coupled microresonators

Author: Zhu, Kaixuan, Luo, Xinrui, Wang, Yuanlei, Wang, Ze, Xu, Tianyu, Qian, Du, Cheng, Yinke, Wang, Junqi, Luo, Haoyang, Liu, Yanwu, Jin, Xing, Xie, Zhenyu, Zhou, Xin, Wang, Min, Liu, Jian-Fei, Cao, Xuening, Wang, Ting, Tang, Shui-Jing, Gong, Qihuang, Li, Bei-Bei, Yang, Qi-Fan

Issue&Volume: 2026-03-30

Abstract: The drive to miniaturize optical frequency combs for practical deployment has spotlighted microresonator solitons as a promising chip-scale candidate. However, these soliton microcombs could be very power-hungry when their span increases, especially with fine comb spacings. As a result, realizing an octave-spanning comb at microwave repetition rates for direct optical-microwave linkage is considered not possible for photonic integration due to the high power requirements. Here, we introduce the concept of resonant-coupling to soliton microcombs to reduce pump consumption significantly. Compared to conventional waveguide-coupled designs, we demonstrate (i) a threefold increase in spectral span for high-power combs and (ii) up to a tenfold reduction in repetition frequency for octave-spanning operation. This configuration is compatible with laser integration and yields reliable, turnkey soliton generation. By eliminating the long-standing pump-power bottleneck, microcombs will soon become readily available for portable optical clocks, massively parallel data links, and field-deployable spectrometers.

DOI: 10.1038/s41377-026-02186-9

Source: https://www.nature.com/articles/s41377-026-02186-9