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187 W, 3.7 mJ from spectrally combined pulsed 2 ns fiber amplifiers

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


Optics Letters 34 (2009), No.3, pp.226-228
ISSN: 0146-9592
Journal Article
Fraunhofer IOF ()

We report on a spectral combination of four 2 ns pulsed fiber amplifier systems to a total output power of 187 W at a 50 kHz repetition rate resulting in >3.7 mJ of pulse energy and 1.7 MW of pulse peak power. A dielectric reflection grating is used to merge the four individual beams to one output with close to diffraction-limited beam quality independent of the power level. The output characteristics are beyond the capabilities of a single emitter and further scaling in a straightforward way appears to be feasible. (C) 2009 Optical Society of America