High efficient beam cleanup based on stimulated Brillouin scattering with a large core fiber. (15th September 2014)

• Record Type: Journal Article
• Authors: Gao, Qilin; Lu, Zhiwei; Zhu, Chengyu; Zhang, Jianhui
• Is Part Of: Laser and particle beams. Volume 32:Number 4(2014)
• Page Start: 517
• Page End: 521
• Publication Date: 2014-09-15
• Subjects: Beam cleanup, -- High conversion efficiency, -- Large core fiber, -- Stimulated Brillouin scattering; Laser beams -- Periodicals; Particle beams -- Periodicals; 535.5
• DOI: 10.1017/S0263034614000445
• Languages: English
• ISSNs: 0263-0346

Abstract

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 M 2 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.