Spatially dispersive amplification in a 12-core fiber and femtosecond pulse synthesis by coherent spectral combining

Philippe Rigaud (1) , Vincent Kermène (1) , Géraud Bouwmans (2) , Laurent Bigot (2) , Agnès Desfarges-Berthelemot (1) , D. Labat (2) , Antoine Le Rouge (2) , Tigran Mansuryan (1) , Alain Barthélémy (1)

1 XLIM-PHOTONIQUE - PHOTONIQUE
2 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

A compact scheme is demonstrated for amplification and synthesis of ultrashort pulses by fiber amplifiers. Femtosecond pulses are split in 12 different spectral bands which are amplified separately in the 12 cores of a multicore ytterbium doped fiber. Combining the amplifier outputs together with the intensity and phase management of the spectral bands lead to short pulse synthesis with adjustable pulse shape. The scheme gave an x 92 enhancement in amplified power before the onset of nonlinear effects by comparison with standard stretcher free amplification in a single core fiber.

Domaines: Optique [physics.optics]

Philippe Rigaud, Vincent Kermène, Géraud Bouwmans, Laurent Bigot, Agnès Desfarges-Berthelemot, et al.. Spatially dispersive amplification in a 12-core fiber and femtosecond pulse synthesis by coherent spectral combining. Optics Express, 2013, 21 (11), pp.13555-13563. ⟨10.1364/OE.21.013555⟩. ⟨hal-00914878⟩