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Preferential gain photonic-crystal fiber for mode stabilization at high average powers

: Eidam, T.; Hädrich, S.; Jansen, F.; Stutzki, F.; Rothhardt, J.; Carstens, H.; Jauregui, C.; Limpert, J.; Tünnermann, A.

Postprint (9,81Byte; PDF; )

Optics Express 19 (2011), No.9, pp.8656-8661
ISSN: 1094-4087
Journal Article, Electronic Publication
Fraunhofer IOF ()

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 M2 value of 1.4.