Journal
OPTICS LETTERS
Volume 30, Issue 21, Pages 2855-2857Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.30.002855
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We propose and demonstrate a novel approach in optical fiber design in which the optical waveguide is formed by a ring of large air holes surrounding a solid silica core. With an appropriate choice of the geometrical configuration, robust single-transverse-mode propagation with a record effective area of 1417 mu m(2), verified by various methods, was demonstrated. A breakthrough was made toward the development of practical ultra-high-power fiber lasers as we observed negligible loss of the fiber at bending diameters as small as 15 cm. (c) 2005 Optical Society of America.
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