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Shoji Tanigawa, Teruno Nakaguma, Tomofumi Arai, Kentaro Ichii: Ytterbium-doped optical fiber, fiber laser and fiber amplifier. Fujikura, Sughrue Mion PLLC, January 27, 2015: US08941912 (143 worldwide citation)

An ytterbium-doped optical fiber includes: a core which contains at least ytterbium, aluminum, and phosphorus; and a cladding which encircles the core, wherein an aluminum oxide equivalent concentration of the aluminum in the core is 0.2 mol % or more, a diphosphorus pentaoxide equivalent concentrat ...


2
Kentaro ICHII, Shoji TANIGAWA, Tomofumi ARAI: Ytterbium-doped optical fiber. Fujikura, August 25, 2011: US20110206341-A1

Provided is an ytterbium-doped optical fiber including a core containing at least ytterbium, aluminum and phosphorous and a clad surrounding the core, wherein a molar concentration of diphosphorus pentoxide with respect to phosphorus in the core is equal to a molar concentration of aluminum oxide wi ...


3
Shoji TANIGAWA, Teruno NAKAGUMA, Tomofumi ARAI, Kentaro ICHII: Ytterbium-doped optical fiber, fiber laser and fiber amplifier. Fujikura, June 16, 2011: US20110142083-A1

An ytterbium-doped optical fiber includes: a core which contains at least ytterbium, aluminum, and phosphorus; and a cladding which encircles the core, wherein an aluminum oxide equivalent concentration of the aluminum in the core is 0.2 mol % or more, a diphosphorus pentaoxide equivalent concentrat ...