| ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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A low-threshold multiwavelength Brillouin fiber laser with double-frequency spacing based on a small-core fiber |
| Lu-Lu Xu(徐路路)1,3,4, Ying-Ying Wang(王莹莹)1,3,4, Li Jiang(江丽)1,3,4, Pei-Long Yang(杨佩龙)1,3,4, Lei Zhang(张磊)2, and Shi-Xun Dai(戴世勋)1,3,4,† |
1 Laboratory of Infrared Materials and Devices, The Research Institute of Advanced Technologies, Ningbo University, Ningbo 315211, China;
2 Research and Development Center, Yangtze Optical Fiber and Cable Company Ltd, Wuhan 430073, China;
3 Key Laboratory of Photoelectric Materials and Devices of Zhejiang Province, Ningbo 315211, China;
4 Engineering Research Center for Advanced Infrared Photoelectric Materials and Devices of Zhejiang Province, Ningbo 315211, China |
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Abstract We demonstrate multiwavelength Brillouin fiber lasers (MWBFLs) with double-frequency spacing based on a small-core fiber (SCF) and a standard single-mode fiber (SMF), which have core diameters of 5 and 8.8 μm, respectively. Experimental results show that the SCF-based MWBFL exhibits a higher laser output power and a lower pump threshold. The output powers of the SCF-based MWBFL are > 1.4 times those of the SMF-based MWBFL. Moreover, the threshold power required to generate each channel of the SCF-based MWBFL is 59% that of the SMF-based MWBFL. When the same pump power of 180 mW is injected, the number of laser channels generated for the SCF-based MWBFL is 13, which is twice that generated for the SMF-based MWBFL. In addition, the SCF-based MWBFL exhibits good wavelength tunability from 1535 to 1565 nm and temporal stability over an hour.
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Received: 01 April 2021
Revised: 30 April 2021
Accepted manuscript online: 10 May 2021
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PACS:
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42.55.Wd
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(Fiber lasers)
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42.81.-i
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(Fiber optics)
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42.65.Es
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(Stimulated Brillouin and Rayleigh scattering)
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42.81.Cn
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(Fiber testing and measurement of fiber parameters)
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| Fund: Project supported by the National Natural Science Foundation of China (Grant No. 61875094), China Postdoctoral Science Foundation (Grant No. 2018M642386), and K. C. Wong Magna Fund in Ningbo University. |
Corresponding Authors:
Shi-Xun Dai
E-mail: daishixun@nbu.edu.cn
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Cite this article:
Lu-Lu Xu(徐路路), Ying-Ying Wang(王莹莹), Li Jiang(江丽), Pei-Long Yang(杨佩龙), Lei Zhang(张磊), and Shi-Xun Dai(戴世勋) A low-threshold multiwavelength Brillouin fiber laser with double-frequency spacing based on a small-core fiber 2021 Chin. Phys. B 30 084210
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