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18 December 2019 Tunable and switchable multi-wavelength ytterbium-doped fiber laser based on nonlinear polarization rotation effect
Yuxuan Zhang, Yang Yan, Keyu Song, Min Lv
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Proceedings Volume 11333, AOPC 2019: Advanced Laser Materials and Laser Technology; 113331J (2019) https://doi.org/10.1117/12.2548127
Event: Applied Optics and Photonics China (AOPC2019), 2019, Beijing, China
Abstract
In this paper, a simple and effective tunable multi-wavelength ytterbium-doped fiber laser (MWYDFL) is proposed and demonstrated. A nonlinear polarization rotation (NPR) structure, including polarization controller (PC) and polarizationdependent isolator (PDI) is used as the wavelength selector and works to generate intensity-dependence transmission to suppress the mode competition and solves the problem of greater intensity of side modes. Thus the stable all-fiber ring cavity structure is realized. Through controlling and adjusting the polarization of the PC in the cavity, a multiwavelength and tunable single wavelength laser with good performance is achieved under the room temperature. The laser outputs of the single-wavelength can be tuned about 12 nm with an interval of about 1 nm from 1074.42 nm to 1090.97 nm. The side-mode suppression ratios (SMSRs) and the linewidths of these lasing lines are all over 50 dB and less than 0.02 nm. Single-wavelength, dual-wavelength, triple-wavelength and quadruple-wavelength can be switched by appropriately adjusting the PC. The power fluctuations and wavelength shifts are less than 2 dB and 0.02 nm in an hour at room temperature.
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Yuxuan Zhang, Yang Yan, Keyu Song, and Min Lv "Tunable and switchable multi-wavelength ytterbium-doped fiber laser based on nonlinear polarization rotation effect", Proc. SPIE 11333, AOPC 2019: Advanced Laser Materials and Laser Technology, 113331J (18 December 2019); https://doi.org/10.1117/12.2548127
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KEYWORDS
Fiber lasers
Optical isolators
Single mode fibers
Tunable lasers
Wavelength tuning
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