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Optical Engineering

Optical fiber microstructuration for strengthening single-mode laser operation in high power regime
Author(s): Aurélien Benoit; Romain Dauliat; Kay Schuster; Stephan Grimm; Raphaël Jamier; François Salin; Philippe Roy
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Paper Abstract

We propose an in-depth investigation of all-solid microstructured optical fibers for the development of very large mode area (VLMA) fiber lasers. The inner cladding microstructure of these VLMA fibers is carefully optimized in order to get a robust single-mode laser operation in the high power regime. We describe the numerical approach used to devise a novel kind of fiber structures, the core of which should be larger than 50 μm while showing an improved single-mode emission compared to that of the state-of-the-art large pitch fibers. With the aim of overpassing the limitations of chemical vapor deposition techniques, we opted for a manufacturing process called Repusil, based on the sintering and vitrification of doped powders. Then, our opto-geometrical considerations result from the optical properties offered by this method and the use of the stack and draw. Finally, we present our very first fabrication for the proposed all-solid microstructured fibers in which a laser emission of 52 W in a continuous wave regime was obtained.

Paper Details

Date Published: 27 February 2014
PDF: 7 pages
Opt. Eng. 53(7) 071817 doi: 10.1117/1.OE.53.7.071817
Published in: Optical Engineering Volume 53, Issue 7
Show Author Affiliations
Aurélien Benoit, EOLITE Systems (France)
Romain Dauliat, XLIM Institut de Recherche (France)
Kay Schuster, Institut für Photonische Technologien e.V. (Germany)
Stephan Grimm, Institut für Photonische Technologien e.V. (Germany)
Raphaël Jamier, XLIM Institut de Recherche (France)
François Salin, EOLITE Systems (France)
Philippe Roy, XLIM Institut de Recherche (France)

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