T. Eidam,
S. Hädrich,
F. Jansen,
F. Stutzki,
J. Rothhardt,
H. Carstens,
C. Jauregui,
J. Limpert,
and A. Tünnermann
Preferential gain photonic-crystal fiber for mode stabilization at high average powers
Opt. Express, 19 :8656 (April 2011)
Preferential gain photonic-crystal fiber for mode stabilization at high average powers
Opt. Express, 19 :8656 (April 2011)
Abstract:
We report on the design and experimental investigation of a preferential gain photonic-crystal fiber with a mode-field diameter of 47 µm. This few-mode fiber design confines the doping of Ytterbium-ions just to the center of the core and, therefore, promotes fundamental mode operation. In a chirped-pulse amplification system we extracted up to 303 W of average power from this fiber with a measured M^2 value of 1.4.