A. Croteau, P. Laperle, H. Zheng, C. Paré, M. Drolet, S. Morency, Y. Taillon, A. Proulx "Fabrication method for LMA multi-cald Yb-doped silica PM fibers" Proc. of SPIE, 7839, art. no. 78390N, 2010
Résumé: The fabrication of a polarization-maintaining version of a large-mode-area multi-clad fiber design with high Yb concentrations and a robust output beam represents a significant challenge due to the high risk of cracking of the doped silica multi-clad next to the core during the drilling procedure. A new preform fabrication approach permitting the realization of a large first-clad fiber featuring a high birefringence, while preserving the preform integrity is presented. The birefringence was improved by locating the stress-applying-parts in the first-clad region and by increasing their boron content. The preform and fiber fabrication will be presented as well as the fiber performances in a pulsed amplifier configuration.
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