Chinese Journal of Quantum Electronics ›› 2025, Vol. 42 ›› Issue (6): 779-787.doi: 10.3969/j.issn.1007-5461.2025.06.005

• Laser Tech. and Devices • Previous Articles     Next Articles

Experimental study on rapid switching of phase‑locked and frequency‑locked broadband lasers

LI Yang 1,2 , LU Sibin 1,3 , JIANG Min 1,3 , SUN Chuan 1,2 , CHEN Xiaoli 1,2 , FU Jiahao 1,2 , LI Runbing 1,3,4*, WANG Jin 1,3,4 , ZHAN Mingsheng 1,3,4   

  1. 1 Innovation Academy for Precision Measurement Science and Technology, Chinese Academy of Sciences, Wuhan 430071, China; 2 University of Chinese Academy of Sciences, Beijing 100049, China; 3 Hefei National Laboratory, Hefei 230088, China; 4 Wuhan Institute of Quantum Technology, Wuhan 430206, China
  • Received:2024-03-21 Revised:2024-05-15 Published:2025-11-28 Online:2025-11-28

Abstract: Atomic interference gyroscopes have extensive application prospects in both scientific research and technological development. Conducting research on laser frequency locking technology with high stability, low phase noise, and the ability to rapidly switch frequencies is of great significance for improving the measurement accuracy and application capabilities of atomic interference gyroscopes. This article proposes a synchronous frequency-switching scheme for laser time-division multiplexing. By performing synchronous feed-forward on the current modulation port of the lasers, we have achieved rapid and synchronous frequency switching in broadband between two lasers in a locked state, and have developed a laser and optical system with high stability and low phase noise. Experimental results show that the frequency stability and phase noise of the laser maintain good performance before and after frequency switching. The frequency switching bandwidth of the laser reaches 1.2 GHz, the frequency switching time is less than 3 ms, the relative frequency stability is better than 4 × 10−12 @20 s, and the phase noise is better than −95 dBc/Hz@(0.1–10 kHz).

Key words: laser techniques, laser frequency locking, laser phase locking, rapid frequency switching, feedforward control, atomic gyroscope

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