We report on a novel ytterbium-doped fiber design which combines the advantages of rod and fiber gain media. The fiber design has the outer dimensions of a rod laser, meaning a diameter in the range of a few millimeters and a length of just a few ten centimeters, but including two important waveguide structures, one for the pump radiation and one for the laser radiation. 120 W output power in single-mode beam quality are obtained from a 48 cm long fiber cane, corresponding to an extracted power of 250 W per meter. The fiber has a significantly reduced nonlinearity and allowing therefore scalability of the performance of high peak power fiber laser and amplifier systems.
© 2005 Optical Society of America
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.4370) Fiber optics and optical communications : Nonlinear optics, fibers
(140.3510) Lasers and laser optics : Lasers, fiber
N. Deguil-Robin, J. Limpert, I. Manek-Hönninger, F. Salin, F. Röser, A. Liem, T. Schreiber, S. Nolte, H. Zellmer, A. Tünnermann, J. Broeng, A. Petersson, and C. Jakobsen, "Rod-type fiber laser," in Advanced Solid-State Photonics (TOPS), C. Denman and I. Sorokina, eds., Vol. 98 of OSA Trends in Optics and Photonics (Optical Society of America, 2005), paper 511.
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