650 W All-Fiber Single-Frequency Polarization-Maintaining Fiber Amplifier Based on Hybrid Wavelength Pumping and Tapered Yb-Doped Fibers

Based on hybrid wavelength pumping and tapered Yb-doped fibers (T-YDFs), a 650 W all-fiber single-frequency polarization-maintaining fiber amplifier was demonstrated experimentally at 1030 nm. Different pump power ratios in the T-YDF-based power-amplifier stage were proposed to investigate their inf...

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Bibliographic Details
Published inPhotonics Vol. 9; no. 8; p. 518
Main Authors Jiang, Wanpeng, Yang, Changsheng, Zhao, Qilai, Gu, Quan, Huang, Jiamin, Jiang, Kui, Zhou, Kaijun, Feng, Zhouming, Yang, Zhongmin, Xu, Shanhui
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.07.2022
Subjects
Amplifiers (Electronics)
Doped fibers
Equipment and supplies
Fiber optics
Fibers
Gravitational waves
Heat
high power
hybrid wavelength pumping
Lasers
Polarization
Power amplifiers
Pumping
R&D
Research & development
single frequency
tapered Yb-doped fiber
Wavelength
China
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Summary:Based on hybrid wavelength pumping and tapered Yb-doped fibers (T-YDFs), a 650 W all-fiber single-frequency polarization-maintaining fiber amplifier was demonstrated experimentally at 1030 nm. Different pump power ratios in the T-YDF-based power-amplifier stage were proposed to investigate their influence on the transverse mode instability (TMI) effect. The highest TMI threshold was obtained when the pump power ratio of 940 nm to 976 nm was 1:4.4. A measured M2 factor of 1.7 and a polarization extinction ratio of 14 dB at the maximum output power were obtained. To the best of our knowledge, these results exhibit the highest output power of any all-fiber single-frequency polarization-maintaining fiber amplifiers created up to now.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics9080518