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Opt Lett. 2008 Nov 15;33(22):2701-3.

Multifilament-core fibers for high energy pulse amplification at 1.5 microm with excellent beam quality.

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1
Office National d'Etudes et de Recherches Aérospatiales, Département d'Optique Théorique et Appliquée, Chemin de la Hunière, Palaiseau, France. guillaume.canat@onera.fr

Abstract

We report on what we believe to be the first demonstration of an erbium-ytterbium-doped multifilament-core (MFC) fiber for single-mode amplification of narrow linewidth high peak power pulses. A master-oscillator-power-fiber-amplifier laser source has been demonstrated using a 37-filament MFC fiber in the last amplification stage. Pulses with 750 microJ (940 W peak power) and laser linewidth<1 MHz have beam generated with M2 approximately 1.3. This value is close to the theoretical value M2 approximately 1.5.

PMID:
19015714
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