Cheng Kang, Wei Ning, Zhang Yihui, Tao Haixu, Hu Yibiao, Chen Jie, Dong Ningning, He Jiajing, Wang Jun
Opt Lett. 2025 Mar 15;50(6):1783-1786. doi: 10.1364/OL.554895.
Low-noise stable lasers have broad applications in metrology, spectroscopy, communication, and quantum physics. Here we demonstrate locking a semiconductor laser to an on-chip silicon nitride Mach-Zehnder interferometer (MZI) using the Pound-Drever-Hall (PDH) stabilization technology. After locking, the frequency noise of the laser is suppressed by up to 37 dB, and the relative stability reaches 3 10 at a gate time of 1 ms, showing an order of magnitude improvement compared to a free-running operation. In addition, the linewidth of the stabilized laser is 420 kHz at an integration time of 10 ms, narrowed by eight times.
