Search International and National Patent Collections

1. (WO2010119930) MULTI-CORE OPTICAL FIBER

Pub. No.:    WO/2010/119930    International Application No.:    PCT/JP2010/056789
Publication Date: Fri Oct 22 01:59:59 CEST 2010 International Filing Date: Fri Apr 16 01:59:59 CEST 2010
IPC: G02B 6/04
G02B 6/00
Applicants: FURUKAWA ELECTRIC CO., LTD.
古河電気工業株式会社
IMAMURA, Katsunori
今村 勝徳
Inventors: IMAMURA, Katsunori
今村 勝徳
Title: MULTI-CORE OPTICAL FIBER
Abstract:
Provided is a multi-core optical fiber which comprises a plurality of core portions, and a cladding portion provided on an outer periphery of each core portion and having a refractive index lower than the refractive index of each core portion. The diameter of each core portion is 12 μm or less; the relative refractive index difference between the core portions and the cladding portion is 0.2 % or more; the cutoff wavelength is 1.53 μm or less; the bending loss at the wavelength of 1.55 μm when wrapped at a diameter of 20 mm is 10 dB/m or less; the effective core sectional area at the wavelength of 1.55 μm is 30 μm2 or more; and the distance between the adjacent core portions is such that the cross talk of light between the core portions over the whole length is -35dB or less at the wavelength of 1.55 μm. Consequently, a multi-core optical fiber having a high productivity and suitable for large capacity optical transmission is provided.