High-energy femtosecond Yb-doped fiber laser operating in the anomalous dispersion regime.
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 microJ-level.
Institute of Applied Physics, Friedrich Schiller University Jena, Albert-Einstein-Strasse 15, D-07745 Jena, Germany. ortac@iap.uni-jena.de
Bülend
B
Ortaç
Jens
J
Limpert
Andreas
A
Tünnermann