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10.4 kW coherently-combined ultrafast fiber laser

 
: Müller, M.; Aleshire, C.; Stark, H.; Buldt, J.; Steinkopff, A.; Klenke, A.; Tünnermann, A.; Limpert, J.

:

Dong, L. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber Lasers XVII. Technology and Systems : 3-6 February 2020, San Francisco, California, United States
Bellingham, WA: SPIE, 2020 (Proceedings of SPIE 11260)
ISBN: 978-1-5106-3283-7
ISBN: 978-1-5106-3284-4
Paper 112600B, 8 pp.
Conference "Fiber Lasers - Technology and Systems" <17, 2020, San Francisco/Calif.>
English
Conference Paper
Fraunhofer IOF ()

Abstract
We present a coherently-combined ultrafast fiber laser system consisting of twelve amplifier channels delivering 10.4 kW average power at 80 MHz repetition rate with a pulse duration of 240 fs FWHM and an almost diffraction-limited beam quality of M2 ≤ 1.2. The system incorporates an automated self-adjustment of the beam combination with 3 degrees of freedom per channel. The system today is, to the best of our knowledge, the world's most average-powerful femtosecond laser. Thermographic analysis indicates that power scaling to 100 kW-class average power is feasible.

: http://publica.fraunhofer.de/documents/N-589989.html