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High-pulse energy and average-power ultrashort laser pulses via nonlinear compression of coherently combined fiber CPA system

: Hädrich, Steffen; Klenke, Arno; Hoffmann, Armin; Eidam, Tino; Gottschall, Thomas; Rothhardt, Jan; Limpert, Jens; Tünnermann, Andreas


Ramachandran, S. ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Fiber Lasers XI. Technology, Systems, and Applications : 3 - 6 February 2014, San Francisco, California, United States
Bellingham, WA: SPIE, 2014 (Proceedings of SPIE 8961)
ISBN: 978-0-8194-9874-8
Paper 89611E
Conference "Fiber Lasers - Technology, Systems, and Applications" <11, 2014, San Francisco/Calif.>
Fraunhofer IOF ()
ultrashort pulses; high peak power; high average power

Coherent combination applied to state-of-the-art femtosecond fiber CPA systems has recently opened the route towards high energy and average power laser systems. The ~2 mJ, 340 fs, 196 W (100 kHz) pulses of such a system are coupled to an argon-filled hollow-core fiber for spectral broadening via self-phase modulation. Subsequent compression in a chirped mirror compressor leads to ~1 mJ, 45 fs, 96 W pulses. Under different conditions 580 µJ, 26 fs, 11.6 GW, 135 W (250 kHz) pulses are achieved. This is an unprecedented combination of average power and pulse energy.