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66 W average power from a microjoule-class sub-100 fs fiber oscillator

: Baumgartl, Martin; Lecaplain, Caroline; Hideur, Ammar; Limpert, Jens; Tünnermann, Andreas


Optics Letters 37 (2012), No.10, pp.1640-1642
ISSN: 0146-9592
Journal Article
Fraunhofer IOF ()

Performance scaling of passively mode-locked ultrashort-pulse fiber oscillators in terms of average power, peak power, and pulse energy is demonstrated. A very-large-mode-area fiber laser in an all-positive group-velocity-dispersion ring cavity configuration with intracavity spectral filter, mode-locked by nonlinear polarization evolution, emits 66 W of average power at 76 MHz repetition rate, corresponding to 0.9 µJ pulse energy. The pulses are dechirped to 91 fs outside the cavity with an average power of 60 W remaining after the compressor. The generated pulse peak power is as high as 7 MW.