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24 November 2021 Single-polarization single-frequency DFB fiber laser with transverse mode switchable output
Yue Tao, Man Jiang, Can Li, Pu Zhou, Zongfu Jiang
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Proceedings Volume 12060, AOPC 2021: Advanced Laser Technology and Applications; 1206010 (2021) https://doi.org/10.1117/12.2606528
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China
Abstract
A single-polarization single-frequency (SPSF) 1030 nm distributed feedback (DFB) fiber laser with mode switchable output is achieved. The DFB fiber laser is realized based on a 5 cm long π-phase shifted fiber Bragg grating (PS-FBG). A maximum output power of 84 mW with single-polarization operation is achieved. The polarization extinction ratio (PER) is around 17 dB and the linewidth is 18 kHz. The slope efficiency is 13% and the spectrum at the highest power shows an excellent optical signal to noise ratio of about 75 dB. Moreover, LP11 mode single-frequency lasing is achieved by adopting an acoustically-induced fiber grating (AIFG). The mode purity is estimated to be higher than 96%. These results, to the best of our knowledge, show the highest output power among the reports that achieve single-frequency 1030 nm DFB laser output with single-polarization operation. Furthermore, it is the first time to realize transverse mode switchable single-frequency fiber laser based on an AIFG. The high order mode single-frequency 1030 nm fiber laser has much potential to find applications in multiplexing system.
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Yue Tao, Man Jiang, Can Li, Pu Zhou, and Zongfu Jiang "Single-polarization single-frequency DFB fiber laser with transverse mode switchable output", Proc. SPIE 12060, AOPC 2021: Advanced Laser Technology and Applications, 1206010 (24 November 2021); https://doi.org/10.1117/12.2606528
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KEYWORDS
Fiber lasers
Polarization
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