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Average power of 1.1 kW from spectrally combined, fiber-amplified, nanosecond-pulsed sources

: Schmidt, O.; Wirth, C.; Tsybin, I.; Schreiber, T.; Eberhardt, R.; Limpert, J.; Tünnermann, A.


Optics Letters 34 (2009), Nr.10, S.1567-1569
ISSN: 0146-9592
Fraunhofer IOF ()
photonic crystal fiber; doped fiber; laser; area

We report on spectral combination of four high repetition rate 5 ns pulsed Yb-doped fiber amplifiers at 1 mu m wavelength. The output beam is spatially and temporally superposed by use of an all-reflective diffraction grating. 1.1 kW average power and 220 mu J pulse energy were extracted with a combining efficiency of 99%.