We report on the generation of high-average-power and high-peak-power ultrashort pulses from a mode-locked fiber laser operating in the all-normal-dispersion regime. As gain medium, a large-mode-area ytterbium-doped large-pitch photonic-crystal fiber is used. The self-starting fiber laser delivers 27W of average power at 50.57MHz repetition rate, resulting in 534nJ of pulse energy. The laser produces positively chirped 2ps output pulses, which are compressed down to sub-100fs, leading to pulse peak powers as high as 3.2MW.

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2010 (5)

2009 (2)

2008 (2)

Baer, C. R. E.

Bauer, D.

Baumgartl, M.

Boullet, J.

Chong, A.

Cormier, E.

Dekorsy, T.

Deng, Y.

Golling, M.

Guina, M.

Heckl, O. H.

Hideur, A.

Huber, G.

Jansen, F.

Jauregui, C.

Kafka, J. D.

Keller, U.

Kieu, K.

Killi, A.

Kleinbauer, J.

Kränkel, C.

Kumkar, M.

Lecaplain, C.

Lefrançois, S.

Limpert, J.

Machinet, G.

Neuhaus, J.

Ortaç, B.

Otto, H.

Petermann, K.

Peters, R.

Renninger, W.

Saraceno, C. J.

Schreiber, T.

Stutzki, F.

Südmeyer, T.

Sutter, D. H.

Tünnermann, A.

Weiler, S.

Wise, F.

Wise, F. W.

Zhang, J.

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Figures (5)

Fig. 1
Fig. 1

Schematic set-up. L, lens; DM, dichroic mirror; HR, high reflection mirror; QWP and HWP, quarter- and half-wave plate; BR filter, birefringent filter.

Fig. 2
Fig. 2

(a) Microscope image of the fiber cross section. (b) Beam profile at 27 W output power.

Fig. 3
Fig. 3

(a) Pulse train on analog oscilloscope, (b) two consecutive peaks on a 50 GHz sampling oscilloscope (resolution 5 ps ), (c) rf spectrum, resolution bandwidth 300 Hz .

Fig. 4
Fig. 4

Optical spectrum; inset, logarithmic scale.

Fig. 5
Fig. 5

Autocorrelation traces, externally compressed pulse; inset, chirped pulse.