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High-energy femtosecond Yb-doped dispersion compensation free fiber laser

: Ortac, B.; Limpert, J.; Tünnermann, A.; Schmidt, O.; Schreiber, T.; Hideur, A.

Postprint (702 KByte; PDF; )

Optics Express 15 (2007), No.17, pp.10725-10732
ISSN: 1094-4087
Journal Article, Electronic Publication
Fraunhofer IOF ()

We report on a mode-locked high energy fiber laser operating in the dispersion compensation free regime. The sigma cavity is constructed with a saturable absorber mirror and short-length large-mode-area photonic crystal fiber. The laser generates positively-chirped pulses with an energy of 265 nJ at a repetition rate of 10.18 MHz in a stable and self-starting operation. The pulses are compressible down to 400 fs leading to a peak power of 500 kW. Numerical simulations accurately reflect the experimental results and reveal the mechanisms for self consistent intra-cavity pulse evolution. With this performance mode-locked fiber lasers can compete with state-of-the-art bulk femtosecond oscillators for the first time and pulse energy scaling beyond the µJ-level appears to be feasible.