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2011
Conference Paper
Titel
Robust single-mode ytterbium-doped large pitch fiber emitting 294 W
Abstract
Ytterbium-doped Large Pitch Fibers with very large mode areas are investigated in a high power fiber amplifier configuration. An average output power of 294 W is demonstrated, while maintaining robust single-mode operation with a mode field diameter of 62 µm. Compared to previous active large mode area designs the threshold of mode instabilities is increased by a factor of about 3.