| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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A 51-dB signal-to-noise ratio carrier-envelope offset frequency in an environmentally stabilized polarization-maintaining optical frequency comb |
| Yuyao Zong(宗玉瑶)1,2,3,†, Yi Han(韩羿)2,3,†, Jiawei Liu(刘佳伟)2,3, Cheng Ci(慈骋)1, Zhenyu Xue(薛振宇)1, and Shiying Cao(曹士英)2,3,‡ |
1 College of Information Engineering, China Jiliang University, Hangzhou 310018, China;
2 Division of Time and Frequency Metrology, National Institute of Metrology, Beijing 100029, China;
3 Key Laboratory of State Administration for Market Regulation, Time Frequency and Gravity Primary Standard, Beijing 100029, China |
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Abstract A femtosecond optical frequency comb (OFC) based on a laser with a nonlinear amplification loop mirror mode-locking mechanism is proposed. The laser adopts a fully polarization-maintaining (PM) structure, which can realize self-starting mode-locking at the center wavelength of 1560.2 nm with a 195.65 MHz repetition rate at a pump power of 630 mW, and the frequency stability after phase-locking is 1.95$\times10^{-12}$ with a 1-s averaging time. Through a homemade $f$-2$f$ interferometer, the detected free-running $f_{\rm ceo}$ signal exhibits a signal-to-noise ratio (SNR) as high as 51 dB. After phase-locking, $f_{\rm ceo}$ has a frequency stability of 1.17$\times 10^{-11}$ with a 1-s averaging time.
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Received: 09 August 2025
Revised: 08 September 2025
Accepted manuscript online: 19 September 2025
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PACS:
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42.55.Wd
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(Fiber lasers)
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42.65.-k
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(Nonlinear optics)
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06.30.Ft
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(Time and frequency)
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| Fund: Project supported by the National Key Research and Development Program of China (Grant No. 2021YFF0603801), and the Scientific Research Foundation of the 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:
Yuyao Zong(宗玉瑶), Yi Han(韩羿), Jiawei Liu(刘佳伟), Cheng Ci(慈骋), Zhenyu Xue(薛振宇), and Shiying Cao(曹士英) A 51-dB signal-to-noise ratio carrier-envelope offset frequency in an environmentally stabilized polarization-maintaining optical frequency comb 2026 Chin. Phys. B 35 064206
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