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High-energy femtosecond Yb-doped fiber laser operating in the anomalous dispersion regime

: Ortac, B.; Limpert, J.; Tünnermann, A.


Optics Letters 32 (2007), No.15, pp.2149-2151
ISSN: 0146-9592
Journal Article
Fraunhofer IOF ()
MU-M; generation; pulses

We report on high-energy ultrashort pulse generation from a passively mode-locked ytterbium-doped large-mode-area photonic crystal fiber oscillator operating in the anomalous dispersion regime. In the single-pulse regime, the laser directly generates 880 mW of average power of sub-500 fs pulses at a repetition rate of 53.33 MHz, corresponding to a pulse energy of 16.5 nJ. Stable and self-starting operation is obtained by adapting the spot size at the saturable absorber mirror to the pulse evolution in the low-nonlinearity fiber. The approach presented demonstrates the scaling potential of fiber based short pulse oscillators towards the µJ-level.