Diffraction-limited polarized emission from a multimode ytterbium fiber amplifier after a nonlinear beam converter.
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.
Lombard
L
L
Thales Research and Technology-France, Domaine de Corbeville, 91404 Orsay, France. laurent.lombard@thalesgroup.com
Brignon
A
A
Huignard
J P
JP
Lallier
E
E
Lucas-Leclin
G
G
Georges
P
P
Pauliat
G
G
Roosen
G
G