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High-power fiber lasers and amplifiers

: Tünnermann, A.; Höfer, S.; Liem, A.; Limpert, J.; Reich, M.; Föser, F.; Schreiber, T.; Zellmer, H.


Terry, J.A.C. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.; European Office of Aerospace Research and Development -EOARD-, London:
Solid state laser technologies and femtosecond phenomena : 25 - 27 October 2004, London, United Kingdom
Bellingham/Wash.: SPIE, 2004 (SPIE Proceedings Series 5620)
ISBN: 0-8194-5573-3
Conference "Solid State Laser Technologies and Femtosecond Phenomena" <2004, London>
Conference Paper
Fraunhofer IOF ()
Ytterbium; fiber design; fiber laser and amplifier; nonlinear fiber optic; photonic crystal fiber; power and energy scaling

Experimental results based on rare-earth-doped fibers have impressively shown that fiber lasers and amplifiers are an attractive and power scalable solid-state laser concept. Based on ytterbium-doped large-mode-area double-clad fibers, in the continuous regime, output powers approaching the kW-range with diffraction limited beam quality have been shown. Average output powers in the order of 100 W have been demonstrated in the pulsed regime even for femtosecond fiber lasers. Further power scaling is limited by the end facets damage, thermo-optical problems or nonlinear effects. To overcome these restrictions microstructured fibers with several new preferable features can be used. In our contribution we will discuss power scaling of fiber lasers and amplifiers in the multi kW-range with excellent beam quality based on rare-earth-doped photonic crystal fibers.