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High efficient beam cleanup based on stimulated Brillouin scattering with a large core fiber

  • Qilin Gao (a1), Zhiwei Lu (a1), Chengyu Zhu (a1) and Jianhui Zhang (a1)

Abstract

A novel approach of beam cleanup based on stimulated Brillouin scattering with a large core fiber is proposed to improve the laser beam quality. The fusion splice scheme from a single-mode fiber to a very large core fiber (105 µm) is first employed in stimulated Brillouin scattering to steadily excite the fundamental mode of the Stokes beam. As a result, the output beam achieves a measured M2 value of around 1.3 meanwhile the pump conversion efficiency is up to 90%, which is the best in the reports of stimulated Brillouin scattering cleanup to our knowledge.

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Corresponding author

Address correspondence and reprint requests to: Z. W. Lu, National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin 150080, China. E-mail: zw_lu@sohu.com

References

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