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22 April 2008 Cw-operation of an Ytterbium doped 19-core fiber laser
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The multi-core fiber laser is a promising fiber laser concept since it combines good beam quality and a high mode field diameter to reduce nonlinear effects especially for pulsed laser operation. Therefore this concept is a good candidate for high power fiber laser operation with a good beam quality. In the present paper we report on the characterization and the laser operation of a fiber laser with a hexagonal array of 19-cores. The near and the far field intensity distribution of the emitted beam as well as the bending-induced transversal mode selection have been investigated. The obtained experimental and simulation results and show a good agreement.
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A. Popp, M. Abdou Ahmed, D. Kauffmann, A. Voss, and T. Graf "Cw-operation of an Ytterbium doped 19-core fiber laser", Proc. SPIE 6998, Solid State Lasers and Amplifiers III, 699804 (22 April 2008);

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