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Chin. Phys. B, 2026, Vol. 35(6): 064209    DOI: 10.1088/1674-1056/ae5f86
SPECIAL TOPIC — Ultrafast physics in atomic, molecular and optical systems Prev   Next  

Comparison of cavity structures of 200 MHz repetition rate erbium-doped fiber lasers

Jiawei Liu(刘佳伟)1,2,3, Yuyao Zong(宗玉瑶)4, Yi Han(韩羿)5, and Shiying Cao(曹士英)1,2,3,†
1 Division of Time and Frequency Metrology, National Institute of Metrology, Beijing 100029, China;
2 Key Laboratory of State Administration for Market Regulation, Time Frequency and Gravity Primary Standard, National Institute of Metrology, Beijing 100029, China;
3 Beijing Key Laboratory of Quantum Metrology Technology and Instruments, National Institute of Metrology, Beijing 100029, China;
4 College of Information Engineering, China Jiliang University, Hangzhou 310018, China;
5 State Key Laboratory of Luminescent Materials and Devices, School of Materials Science and Engineering, South China University of Technology, Guangzhou 510640, China
Abstract  As an important component of optical frequency combs, mode-locked lasers are also the main source of noise in optical frequency combs. This paper focuses on the effect of the cavity structure of mode-locked lasers on noise performance. At a pump power of 793 mW, the integrated timing jitter within the range of 10 Hz-10 kHz for the ring cavity, $\sigma$ cavity, and Figure-9 cavity is 216 fs, 307 fs, and 107 fs, respectively, while the integrated relative intensity noise from 1 Hz to 1 MHz is 0.0050%, 0.0029%, and 0.0037%, respectively. The Figure-9 cavity demonstrates superior noise performance, and the $\sigma$ cavity based on nonlinear polarization rotation also exhibits certain resistance to noise interference.
Keywords:  mode-locked fiber laser      laser cavity structure      noise      optical frequency comb  
Received:  05 February 2026      Revised:  02 April 2026      Accepted manuscript online:  15 April 2026
PACS:  42.55.Wd (Fiber lasers)  
  42.60.Da (Resonators, cavities, amplifiers, arrays, and rings)  
  42.62.Eh (Metrological applications; optical frequency synthesizers for precision spectroscopy)  
Fund: Project supported by the Scientific Research Foundation of National Institute of Metrology, China (Grant Nos. AKYZD2411 and AKYZD2511).
Corresponding Authors:  Shiying Cao     E-mail:  caoshiying@nim.ac.cn

Cite this article: 

Jiawei Liu(刘佳伟), Yuyao Zong(宗玉瑶), Yi Han(韩羿), and Shiying Cao(曹士英) Comparison of cavity structures of 200 MHz repetition rate erbium-doped fiber lasers 2026 Chin. Phys. B 35 064209

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