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kW-level, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme

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Abstract

In this manuscript, we demonstrate high-power, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme. By employing a single-mode–multimode–single-mode structure seed laser, a linearly polarized Yb-doped fiber laser with narrow linewidth and high output power is achieved. This laser, when used as a master oscillator, can be capable of suppressing the ASE in the process of power amplification. Thus, only one-stage amplification structure is used to scale up the laser power, and linearly polarized output with a polarization extinction ration of 14 dB, a narrow linewidth of 0.3 nm and an output power of 1018 W are achieved. Moreover, due to the good beam quality of seed laser and the well-designed amplifier stage, the beam quality of the output laser is near-diffraction-limited with $M_{x}^{2}\sim 1.18$ and $M_{y}^{2}\sim 1.24$ at the maximum power, and without mode instability occurring.

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DOI:10.1017/hpl.2017.31

基金项目:This work was supported by Huo Ying Dong Education Foundation of China (No. 151062) and the Foundation for the author of National Excellent Doctoral Dissertation of China (No. 201329).

收稿日期:2017-06-04

录用日期:2017-09-30

网络出版日期:2017-10-30

作者单位    点击查看

Man Jiang:College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
Pengfei Ma:College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaHunan Provincial Collaborative Innovation Center of High Power Fiber Laser, Changsha 410073, China
Long Huang:College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China
Jiangming Xu:College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaHunan Provincial Collaborative Innovation Center of High Power Fiber Laser, Changsha 410073, China
Pu Zhou:College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, ChinaHunan Provincial Collaborative Innovation Center of High Power Fiber Laser, Changsha 410073, China
Xijia Gu:Department of Electrical and Computer Engineering, Ryerson University, 350 Victoria St., Toronto, Ontario M5B 2K3, Canada

联系人作者:Pu Zhou(zhoupu203@163.com)

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引用该论文

Man Jiang, Pengfei Ma, Long Huang, Jiangming Xu, Pu Zhou, and Xijia Gu, "kW-level, narrow-linewidth linearly polarized fiber laser with excellent beam quality through compact one-stage amplification scheme," High Power Laser Science and Engineering 5(4), e30 (2017)

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