Diffraction limited polarized emission from a multimode Yb fiber amplifier after nonlinear beam converter

Laurent Lombard (1) , Arnaud Brignon (1) , Jean-Pierre Huignard (1) , Eric Lallier (1) , Gaëlle Lucas-Leclin (2) , Patrick Georges (2) , Gilles Pauliat (3) , Gérald Roosen (3)

1 TRT - Thales Research and Technologies [Orsay]
2 Laboratoire Charles Fabry de l'Institut d'Optique / Elsa
3 Laboratoire Charles Fabry de l'Institut d'Optique / Manolia

The multimode and depolarized output beam of a highly multimode diode-pumped Yb-doped fiber amplifier is converted to a diffraction-limited, linearly polarized beam by a self-referencing two-wave-mixing process in an infrared-sensitive photorefractive crystal (Rh:BaTiO3 ). As much as 11.6 W of single-mode output is achieved with a 78% multimode-to-single-mode photorefractive conversion efficiency

Domains: Optics [physics.optics]

Laurent Lombard, Arnaud Brignon, Jean-Pierre Huignard, Eric Lallier, Gaëlle Lucas-Leclin, et al.. Diffraction limited polarized emission from a multimode Yb fiber amplifier after nonlinear beam converter. Optics Letters, 2004, 29 (9), pp.989-991. ⟨hal-00701599⟩