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200W average power 1mJ pulse energy from spectrally combined pulsed sub-5 ns fiber laser source

: Schmidt, O.; Ortac, B.; Limpert, J.; Tünnermann, A.; Andersen, T.V.


Gapontsev, D.V. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber lasers VI. Technology, systems, and applications : 26 - 29 January 2009, San Jose, California, United States
Bellingham, WA: SPIE, 2009 (Proceedings of SPIE 7195)
ISBN: 978-0-8194-7441-4
Paper 719519
Conference "Fiber Lasers" <6, 2009, San Jose/Calif.>
Conference Paper
Fraunhofer IOF ()

In this contribution, we report on spectral combination of four sub-5ns pulsed fiber amplifier systems with an average output power of 200W at 200kHz repetition rate resulting in 1mJ of pulse energy. A dielectric reflection grating is used to combine four individual beams to one output possessing a measured M2 value of 1.3 and 1.8, respectively, independent of power level. Extraction of higher pulse energies and peak powers will be discussed.