| SPECIAL TOPIC — Ultrafast physics in atomic, molecular and optical systems |
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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 |
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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.
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Received: 05 February 2026
Revised: 02 April 2026
Accepted manuscript online: 15 April 2026
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PACS:
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42.55.Wd
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(Fiber lasers)
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42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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42.62.Eh
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(Metrological applications; optical frequency synthesizers for precision spectroscopy)
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| 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
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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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