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Ultrafast high power fiber laser systems

: Limpert, J.; Röser, F.; Schreiber, T.; Manek-Hönninger, I.; Salin, F.; Tünnermann, A.

Cariou, J.-P.:
Lasers et amplificateurs à fibre de puissance = High power fiber lasers and amplifiers
Amsterdam: Elsevier, 2006 (Comptes rendus physique 7.2006, Nr.2)
Book Article
Fraunhofer IOF ()
fiber laser and amplifier; nonlinear fiber optic; ultra-short laser pulse; Ytterbium

Fiber laser systems offer unique properties for the amplification of ultrashort pulses to high powers. Two approaches are discussed, the amplification of linearly chirped parabolic pulses and a fiber based chirped pulse amplification system. Using the first method, we succeeded to generate 17-W average power of linearly chirped parabolic pulses at 75 MHz repetition rate and diffraction-limited beam quality in a large-mode-area ytterbium-doped fiber amplifier. The recompression of these pulses with an efficiency of 60% resulted in 80-fs pulses with a peak power of 1.7 MW. Furthermore, we report on a diode-pumped ytterbium-doped double-clad fiber based chirped pulse amplification system delivering 220-fs pulses, at 1040 nm wavelength, 73 MHz repetition rate and up to 131 W average power, corresponding to a peak power of 8 MW. Key element is a diffraction grating compressor consisting of highly efficient transmission gratings in fused silica allowing the recompression at this high power. To cite this article: J. Limpert et al., C. R. Physique 7