Invention Publication
EP2765661A1 MULTI-CORE AMPLIFIED OPTICAL FIBER AND MULTI-CORE OPTICAL FIBER AMPLIFIER
审中-公开
MEHRADRIGEVERSTÄRKTEGLASFASER UNDVERSTÄRKEREINER MEHRADRIGEN GLASFASER
- Patent Title: MULTI-CORE AMPLIFIED OPTICAL FIBER AND MULTI-CORE OPTICAL FIBER AMPLIFIER
- Patent Title (中): MEHRADRIGEVERSTÄRKTEGLASFASER UNDVERSTÄRKEREINER MEHRADRIGEN GLASFASER
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Application No.: EP12837909.6Application Date: 2012-10-04
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Publication No.: EP2765661A1Publication Date: 2014-08-13
- Inventor: TSUCHIDA, Yukihiro , MAEDA, Koichi , MIMURA, Yu , MATSUURA, Hiroshi , WATANABE, Kengo , SAITO, Tsunetoshi , MIYABE, Ryo , MATSUMOTO, Shigeto , AISO, Keiichi , SUGIZAKI, Ryuichi
- Applicant: Furukawa Electric Co., Ltd.
- Applicant Address: 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8322 JP
- Assignee: Furukawa Electric Co., Ltd.
- Current Assignee: Furukawa Electric Co., Ltd.
- Current Assignee Address: 2-3, Marunouchi 2-chome Chiyoda-ku Tokyo 100-8322 JP
- Agency: Schwabe - Sandmair - Marx
- Priority: US201161543109P 20111004; US201261643970P 20120508; US201261700658P 20120913
- International Announcement: WO2013051655 20130411
- Main IPC: H01S3/067
- IPC: H01S3/067 ; G02B6/04 ; H01S3/10
Abstract:
A multi-core amplification optical fiber includes a plurality of core portions doped with a rare-earth element, and a cladding portion positioned at an outer periphery of each of the core portions and having refractive index lower than refractive index of each of the core portions, in which when a concentration of the rare-earth element doped to each of the core portions is 250 ppm to 2000 ppm, a relative refractive index Δ of each of the core portions relative to the cladding portion is 0.5% to 2% at a wavelength of 1550 nm, and a core diameter of each of the core portions is 1 µm to 5 µm, a separation distance between each of the core portions and adjacent one of the core portions is set at equal to or larger than 30 µm and at equal to or smaller than 60 µm so that a crosstalk of light between the adjacent core portions is equal to or lower than -30 dB. Hereby a multi-core amplification optical fiber and a multi-core optical fiber amplifier capable of optical amplification while suppressing lowering of the qualtity in signal light are provided.
Public/Granted literature
- EP2765661B1 MULTI-CORE AMPLIFIED OPTICAL FIBER AND MULTI-CORE OPTICAL FIBER AMPLIFIER Public/Granted day:2018-12-05
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