Amplifying optical fiber and optical amplifier

Number of patents in Portfolio can not be more than 2000

United States of America Patent

PATENT NO 9515450
APP PUB NO 20150318659A1
SERIAL NO

14440984

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Abstract

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A plurality of cores 51 is disposed around the center axis of a first cladding 52 in a state in which an inter-core distance Λ of cores adjacent to each other is equal, a refractive index n1 of the core 51 is provided higher than a refractive index n2 of the first cladding 52, and the refractive index n2 of the first cladding 52 is provided higher than a refractive index n3 of a second cladding 53. Moreover, 5.8≦Λ/MFD(2λc/(λc+λop))≦8 is satisfied, where the inter-core distance is defined as Λ, a mode field diameter of the core is defined as MFD, a cutoff wavelength is defined as λc, and a wavelength of communication light incident on the core 51 is defined as λop.

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Patent Owner(s)

  • FUJIKURA LTD.;NIPPON TELEGRAPH AND TELEPHONE CORPORATION;OSAKA UNIVERSITY;NATIONAL UNIVERSITY CORPORATION SHIMANE UNIVERSITY

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Ichii, Kentaro Sakura, JP 21 791
Masuda, Hiroji Matsue, JP 17 212
Matsuo, Shoichiro Sakura, JP 66 884
Ono, Hirotaka Mito, JP 24 144
Takenaga, Katsuhiro Sakura, JP 63 447
Tsujikawa, Kyouzou Tsukuba, JP 3 12
Yamada, Makoto Sakai, JP 287 3336

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