kHz-precision wavemeter based on reconfigurable microsoliton

Rui Niu, Ming Li, Shuai Wan, Yu Robert Sun, Shui-Ming Hu, Chang-Ling Zou (), Guang-Can Guo and Chun-Hua Dong ()
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Rui Niu: University of Science and Technology of China
Ming Li: University of Science and Technology of China
Shuai Wan: University of Science and Technology of China
Yu Robert Sun: University of Science and Technology of China
Shui-Ming Hu: University of Science and Technology of China
Chang-Ling Zou: University of Science and Technology of China
Guang-Can Guo: University of Science and Technology of China
Chun-Hua Dong: University of Science and Technology of China

Nature Communications, 2023, vol. 14, issue 1, 1-6

Abstract: Abstract The mode-locked microcomb offers a unique and compact solution for photonics applications, ranging from the optical communications, the optical clock, optical ranging, the precision spectroscopy, novel quantum light source, to photonic artificial intelligence. However, the photonic micro-structures are suffering from the perturbations arising from environment thermal noises and also laser-induced nonlinear effects, leading to the frequency instability of the generated comb. Here, a universal mechanism for fully stabilizing the microcomb is proposed and experimentally verified. By incorporating two global tuning approaches and the autonomous thermal locking mechanism, the pump laser frequency and repetition rate of the microcomb can be controlled independently in real-time without interrupting the microcomb generation. The high stability and controllability of the microcomb frequency enables its application in wavelength measurement with a precision of about 1 kHz. The approach for the full control of comb frequency could be applied in various microcomb platforms, and improve their performances in timing, spectroscopy, and sensing.

Date: 2023
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DOI: 10.1038/s41467-022-35728-x

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