| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Stimulated Brillouin Scattering Enhancement Factor Improvement in a 11.6-GHz-Linewidth 1.5-kW Yb-Doped Fiber Amplifier |
| Guang-Bo Liu1,2, Yi-Feng Yang1**, Jian-Hua Wang3, Ye Zheng1,2, Xiao-Long Chen1, Kai Liu1, Chun Zhao1, Yun-Feng Qi1, Bing He1**, Jun Zhou1** |
1Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Research Center of Space Laser Information Technology, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2University of Chinese Academy of Sciences, Beijing 100049
3Department of Space and Command, Academy of Equipment, Beijing 101416
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| Cite this article: |
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Guang-Bo Liu, Yi-Feng Yang, Jian-Hua Wang et al 2016 Chin. Phys. Lett. 33 074207 |
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Abstract The stimulated Brillouin scattering (SBS) threshold enhancement factor in a pure white noise linewidth broadening Yb-doped fiber amplifier (YDFA) with a short large mode area fiber is theoretically and experimentally studied. We demonstrate a 1064.08 nm, 11.6 GHz linewidth, 1.5 kW output power YDFA with an SBS threshold enhancement of $\sim$57 (26 W SBS threshold with single frequency seed). The output beam is near-diffraction limited with a beam quality factor of $M^{2}=1.15$ and a slope efficiency of up to 87%. No SBS or stimulated Raman scattering effects are observed in the whole power range. Further power scaling is limited by the available pump power in our system.
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Received: 15 April 2016
Published: 01 August 2016
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| PACS: |
42.55.Wd
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(Fiber lasers)
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42.60.Fc
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(Modulation, tuning, and mode locking)
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42.65.Es
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(Stimulated Brillouin and Rayleigh scattering)
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