High energy, single-mode, narrow-linewidth fiber laser source using stimulated Brillouin scattering beam cleanup

Bastien Steinhausser (1) , Arnaud Brignon (1) , Eric Lallier (1) , Jean-Pierre Huignard (1) , Patrick Georges (2)

1 Thales Research and Technology [Palaiseau]
2 Laboratoire Charles Fabry de l'Institut d'Optique / Elsa

We propose an original nonlinear beam cleaning fiber laser architecture to obtain high energy pulses with a good beam quality and a narrow linewidth. The output beam of a large core Er:Yb co-doped multimode fiber amplifier (M2 ~ 6, 220 μJ) is converted into a near diffraction limited beam (M2 = 1.6) through a stimulated Brillouin scattering injection seeded beam cleanup process. We report in this experiment a multimode to single mode conversion efficiency of 50% while preserving the master oscillator linewidth

Domaines: Optique [physics.optics]

Bastien Steinhausser, Arnaud Brignon, Eric Lallier, Jean-Pierre Huignard, Patrick Georges. High energy, single-mode, narrow-linewidth fiber laser source using stimulated Brillouin scattering beam cleanup. Optics Express, 2007, 15 (10), pp.6464-6469. ⟨hal-00700697⟩