Journal
OPTICS EXPRESS
Volume 24, Issue 11, Pages 2063-2071Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.24.012063
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Funding
- National High Technology Research and Development Program of China [2014AA041901]
- NSAF Foundation of National Natural Science Foundation of China [U1330134]
- National Natural Science Foundation of China (NSFC) [61308024]
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We report an 8-element spectral beam combination of Yb-doped all fiber superfluorescent sources around 1070 nm wavelength. Each source consists of a 60 mW front-end and a 1.5 kW three-stage fiber amplifier chain. The eight output beamlets are spectrally combined using a home-made polarization-independent multilayer dielectric reflective diffraction grating. 10.8 kW output power is achieved with an efficiency of 94%. Besides, both theoretical and experimental studies of dual grating dispersion compensation scheme have been performed, which is proved to be a prospective way for high brightness spectral beam combination. (C) 2016 Optical Society of America
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