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

Published online by Cambridge University Press:  15 September 2014

Qilin Gao
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
Zhiwei Lu
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
Chengyu Zhu
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
Jianhui Zhang
Affiliation:
National Key Laboratory of Science and Technology on Tunable Laser, Harbin Institute of Technology, Harbin, China
Corresponding
E-mail address:

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.

Type
Research Article
Copyright
Copyright © Cambridge University Press 2014 

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