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. 2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers.
Opt Express 2009;
17:1178-1183. [PMID:
19188944 DOI:
10.1364/oe.17.001178]
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Abstract
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).
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