Long period gratings written in large-mode area photonic crystal fiber
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We report for the first time, to the best of our knowledge, on the fabrication and characterization of CO2-laser written long-period gratings in a large-mode area photonic crystal fiber with a core diameter of 25 μm. The gratings have low insertion losses (<1 dB) and high attenuation (>10 dB) at the resonant wavelengths, making them particularly interesting for high power applications.
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- 2.V. Fomin, A. Mashkin, M. Abramov, A. Ferin, V. Gapontsev, 3 kW Yb fibre lasers with a single-mode output, in International Symposium on High-Power Fiber Lasers and Their Applications, St. Petersburg (2006) Google Scholar