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22GW peak power femtosecond fiber CPA system

: Klenke, A.; Hädrich, S.; Eidam, T.; Rothhardt, J.; Kienel, M.; Hoffmann, A.; Demmler, S.; Gottschall, T.; Limpert, Jens; Tünnermann, Andreas


Shaw, B.L. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber Lasers XII. Technology, Systems, and Applications : 9-12 February 2015, San Francisco, California
Bellingham, WA: SPIE, 2015 (Proceedings of SPIE 9344)
ISBN: 978-1-62841-434-9
Paper 93441A, 6 S.
Conference "Fiber Lasers - Technology, Systems, and Applications" <12, 2015, San Francisco/Calif.>
Fraunhofer IOF ()

Over the last decade, the performance of femtosecond fiber laser systems has been rapidly improved. However, further improvements might be held back due to different physical limitations such as nonlinearities or optically induced damage. We demonstrate that with the coherent combination of four parallel fiber amplifiers record pulse energies and peak-powers of 5.7 mJ and 22 GW, respectively, could be achieved. These values could be realized with a chirped-pulseamplification (CPA) laser system running at a repetition rate of 40 kHz and delivering a compressed average power of 230 W. A high combination efficiency of 89% was achieved demonstrating the scalability of the combining approach to a larger number of channels.