We describe a beam cleanup setup to convert a multimode beam into a singlemode beam by Stimulated-Brillouin-Scattering in a multimode gradient-index fiber. A M2=6.5 beam is converted into a M2=1.3 beam with 31% efficiency.
© 2006 Optical Society of America
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(290.0290) Scattering : Scattering
(290.5900) Scattering : Scattering, stimulated Brillouin
L. Lombard, A. Brignon, J. Huignard, E. Lallier, and P. Georges, "Beam Cleanup in a Self-Aligned Gradient Index Brillouin Cavity for High Power Multimode Fiber Amplifiers," in Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies, Technical Digest (CD) (Optical Society of America, 2006), paper CTuI2.
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