MICROSTRUCTURED FIBERS: Photonic-bandgap fiber amplifier reaches for the stars

Record high output power generated from ytterbium-doped fiber amplifiers above 1150 nm has been achieved in a solid-core photonic-bandgap fiber. The photonic bandgap inhibits the growth of amplified spontaneous emission, which normally limits the power scalability at long wavelengths with low gain. Christina B. Olausson, Jens K. Lyngsøe, Jes Broeng of Crystal Fibre; and Hiroki Maruyama, and Akira Shirakawa of University of Electro-Communications, Tokyo
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