2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers

We report on beam combining of four narrow-linewidth fiber amplifier chains, running at different wavelengths and each delivering 500 W optical output power. The main amplifier stage consists of a large mode area photonic crystal fiber. The four output beams of the amplifier chains are spectrally (i...

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Bibliographic Details
Published in:Optics express 2009-02, Vol.17 (3), p.1178-1183
Main Authors: Wirth, C, Schmidt, O, Tsybin, I, Schreiber, T, Peschel, T, Brückner, F, Clausnitzer, T, Limpert, J, Eberhardt, R, Tünnermann, A, Gowin, M, ten Have, E, Ludewigt, K, Jung, M
Format: Article
Language:English
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Summary:We report on beam combining of four narrow-linewidth fiber amplifier chains, running at different wavelengths and each delivering 500 W optical output power. The main amplifier stage consists of a large mode area photonic crystal fiber. The four output beams of the amplifier chains are spectrally (incoherent) combined using a polarization-independent dielectric reflective diffraction grating to form an output beam of 2 kW continuous-wave optical power with good beam quality (M(2)x = 2.0, M(2)y = 1.8).
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.17.001178