Bai Yan, Zhang Menghua, Shi Qi, Ding Shulin, Qin Yingchun, Xie Zhenda, Jiang Xiaoshun, Xiao Min
National Laboratory of Solid State Microstructures, College of Engineering and Applied Sciences, and School of Physics, Nanjing University, Nanjing 210093, China.
Department of Physics, University of Arkansas, Fayetteville, Arkansas 72701, USA.
Phys Rev Lett. 2021 Feb 12;126(6):063901. doi: 10.1103/PhysRevLett.126.063901.
By generating a Brillouin laser in an optical microresonator, we realize a soliton Kerr microcomb through exciting the Kerr frequency comb using the generated Brillouin laser in the same cavity. The intracavity Brillouin laser pumping scheme enables us to access the soliton states with a blue-detuned input pump. Because of the ultranarrow linewidth and the low-noise properties of the generated Brillouin laser, the observed soliton microcomb exhibits narrow-linewidth comb lines and stable repetition rate. Also, we demonstrate a low-noise microwave signal with phase noise of -49 dBc/Hz at 10 Hz, -130 dBc/Hz at 10 kHz, and -149 dBc/Hz at 1 MHz offsets for a 10.43 GHz carrier with only a free-running input pump. The easy operation of the Brillouin-Kerr soliton microcomb with excellent performance makes our scheme promising for practical applications.
通过在光学微谐振器中产生布里渊激光，我们在同一腔内利用产生的布里渊激光激发克尔频率梳，从而实现了孤子克尔微梳。腔内布里渊激光泵浦方案使我们能够通过蓝失谐输入泵浦来获得孤子态。由于产生的布里渊激光具有超窄线宽和低噪声特性，所观测到的孤子微梳呈现出线宽窄的梳状谱线和稳定的重复频率。此外，对于仅使用自由运行输入泵浦的10.43GHz载波，我们展示了一种低噪声微波信号，其在10Hz时的相位噪声为-49dBc/Hz，在10kHz时为-130dBc/Hz，在1MHz频偏时为-149dBc/Hz。布里渊-克尔孤子微梳操作简便且性能优异，使得我们的方案在实际应用中具有广阔前景。
