Optical fiber microstructuration for strengthening single-mode laser operation in high power regime

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 ìm 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.
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https://hal-unilim.archives-ouvertes.fr/hal-01025463
Contributeur : Raphael Jamier <>
Soumis le : jeudi 17 juillet 2014 - 17:49:28
Dernière modification le : jeudi 11 janvier 2018 - 06:27:35

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Aurélien Benoit, Romain Dauliat, Kay Schuster, Stephan Grimm, François Salin, et al.. Optical fiber microstructuration for strengthening single-mode laser operation in high power regime. Optical Engineering, SPIE, 2014, 53 (7), pp.071817. ⟨10.1117/1.OE.53.7.071817⟩. ⟨hal-01025463⟩

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