OPTICAL FIBER

Japanese Patent JP2018106199

A

PROBLEM TO BE SOLVED: To provide an optical fiber that can reduce bending loss without increasing connection loss and be manufactured easily.SOLUTION: Refractive index Δ1 and maximum refractive index Δ1 max of a core 1, refractive index Δ2 and minimum refractive index Δ2 min of an inner cladding part 2, and refractive index Δ3 of an outer cladding part 3 satisfy the following relation. Δ1 max>Δ2 min, and Δ1 max>Δ3, 0.01%≤|Δ2 min-Δ3|≤0.03%. Circumferential radius r1 of the core, circumferential radius r2 of the inner cladding part, and circumferential radius r3 of the outer cladding part satisfy the following relation. r1Δ3>Δ2 min, 0.01%≤(Δ3-Δ2 min)≤0.03%, 0.33%≤Δ1 max≤0.40%, and 6.8≤MFD/λcc≤7.61 are satisfied. The refractive index distribution of the core is step type.SELECTED DRAWING: Figure 2A

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KITAMURA TAKAYUKI
ENDO SHO
KISHI TATSUYA
MARUYAMA RYO

JP2018042419A

July 05, 2018

March 08, 2018

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FUJIKURA LTD

G02B6/036; G02B6/02

JP2006133496A	2006-05-25
JPS60231434A	1985-11-18

WO2010093187A2

2010-08-19

DAVE PECKHAM: "Bend Insensitive, Single Mode Fiber Design Strategies", OFC/NFOEC 2008, JPN6019012399, 24 February 2008 (2008-02-24), US, pages 1 - 28, ISSN: 0004011578

Sumio Tanai
Mitsunaga Igarashi
Toshio Komuro
Yuichiro Shimizu

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