High average power spectral beam combining of four fiber amplifiers to 8.2 kW

We report on the incoherent beam combination of the four narrow-linewidth fiber amplifier chains running at different wavelengths. Each main amplifier stage consists of a large-mode-area photonic crystal fiber delivering more than 2 kW of optical power. The four output beams are spectrally combined...

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Bibliographic Details
Published inOptics letters Vol. 36; no. 16; p. 3118
Main Authors Wirth, Christian, Schmidt, Oliver, Tsybin, Igor, Schreiber, Thomas, Eberhardt, Ramona, Limpert, Jens, Tünnermann, Andreas, Ludewigt, Klaus, Gowin, Michael, ten Have, Eric, Jung, Markus
Format Journal Article
LanguageEnglish
Published United States 15.08.2011
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Summary:We report on the incoherent beam combination of the four narrow-linewidth fiber amplifier chains running at different wavelengths. Each main amplifier stage consists of a large-mode-area photonic crystal fiber delivering more than 2 kW of optical power. The four output beams are spectrally combined to a single beam with an output power of 8.2 kW using a polarization-independent dielectric reflective diffraction grating mainly preserving the beam quality of the individual fiber amplifiers.
ISSN:1539-4794
DOI:10.1364/ol.36.003118