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3.5kW coherently combined ultrafast fiber laser

: Müller, M.; Klenkea, A.; Steinkopff, A.; Shestaev, E.; Tünnermann, A.; Limpert, J.


Carter, A.L. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber lasers XVI. Technology and systems : 4-7 February 2019, San Francisco, California, United States
Bellingham, WA: SPIE, 2019 (Proceedings of SPIE 10897)
ISBN: 978-1-5106-2437-5
ISBN: 978-1-5106-2436-8
Paper 1089719, 8 S.
Conference "Fiber Lasers - Technology and Systems" <16, 2018, San Francisco/Calif.>
LASE Conference <2018, San Francisco/Calif.>
European Commission EC
Advanced Coherent Ultrafast Laser Pulse Stacking
European Commission EC
H2020; 670557; MIMAS
Multi-dimensional interferometric amplification of ultrashort laser pulses
Fraunhofer IOF ()

We present a coherently-combined ultrafast fiber laser system consisting of four amplifier channels delivering 3.5 kW average power at 80 MHz repetition rate with a pulse duration of 430 fs FWHM and a close-to-diffraction-limited beam quality with an M2 < 1.2. The system incorporates a fully automated self-adjustment of the beam combination, allowing for a quasi-turn-key operation of the system. At the date of publication, this system delivers the highest average power reported from an ultrafast laser.