650 W All-Fiber Single-Frequency Polarization-Maintaining Fiber Amplifier Based on Hybrid Wavelength Pumping and Tapered Yb-Doped Fibers
Wanpeng Jiang,
Changsheng Yang,
Qilai Zhao,
Quan Gu,
Jiamin Huang,
Kui Jiang,
Kaijun Zhou,
Zhouming Feng,
Zhongmin Yang,
Shanhui Xu
Affiliations
Wanpeng Jiang
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China
Changsheng Yang
State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China
Qilai Zhao
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China
Quan Gu
State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China
Jiamin Huang
State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China
Kui Jiang
State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China
Kaijun Zhou
State Key Laboratory of Luminescent Materials and Devices and Institute of Optical Communication Materials, South China University of Technology, Guangzhou 510640, China
Zhouming Feng
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China
Zhongmin Yang
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China
Shanhui Xu
School of Physics and Optoelectronics, South China University of Technology, Guangzhou 510640, China
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.
