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Opt Express. 2009 Feb 2;17(3):1178-83.

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

Author information

  • 1Friedrich-Schiller University, Institute of Applied Physics, Jena, Germany. christian.wirth@iof.fraunhofer.de

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).

PMID:
19188944
[PubMed]
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