Title:
OPTICAL FIBER
Document Type and Number:
WIPO Patent Application WO/2012/029427
Kind Code:
A1
Abstract:
Provided is an optical fiber, which is provided with: a center core portion; an inner core layer, which is formed on the outer circumference of the center core portion, and which has a refractive index lower than that of the center core portion; an outer core layer, which is formed on the outer circumference of the inner core layer, and which has a refractive index lower than that of the inner core layer; and a cladding portion, which is formed on the outer circumference of the outer core layer, and which has a refractive index substantially equal to that of the inner core layer. The optical fiber has an effective core cross-section area equal to or more than 130 μm2 at a wavelength of 1,550 nm, a bending loss of 100 dB/m or less at a wavelength of 1,550 nm when the fiber with a diameter of 20 mm is bent, and a cable cutoff wavelength of 1,530 nm or less. Consequently, the optical fiber, which transmits light in a communication wavelength band in single mode, and which has the large effective core-cross section area, while suppressing an increase of the bending loss, is provided.
Inventors:
TSUCHIDA YUKIHIRO (JP)
MUKASA KAZUNORI (JP)
MUKASA KAZUNORI (JP)
Application Number:
PCT/JP2011/066462
Publication Date:
March 08, 2012
Filing Date:
July 20, 2011
Export Citation:
Assignee:
FURUKAWA ELECTRIC CO LTD (JP)
TSUCHIDA YUKIHIRO (JP)
MUKASA KAZUNORI (JP)
TSUCHIDA YUKIHIRO (JP)
MUKASA KAZUNORI (JP)
International Classes:
G02B6/036; G02B6/032
Foreign References:
| JP2010527033A | 2010-08-05 | |||
| JP2005208268A | 2005-08-04 | |||
| JP2009151253A | 2009-07-09 | |||
| JP2006078543A | 2006-03-23 |
Other References:
TAKATOSHI KATO ET AL.: "Dispersion Shifted Fiber for WDM Transmission", IEICE TECHNICAL REPORT, vol. 96, no. 335, 1 November 1996 (1996-11-01), pages 43 - 48, XP002946601
See also references of EP 2613184A4
S MATSUO ET AL.: "Bend-Insensitive and Low-Splice-Loss Optical fiber for Indoor Wiring in FTTH", OFC, 2004
M. B. ASTRUC ET AL.: "Trench-Assisted Profiles for Large-Effective-Area Single-Mode Fibers", ECOC, 2008
See also references of EP 2613184A4
S MATSUO ET AL.: "Bend-Insensitive and Low-Splice-Loss Optical fiber for Indoor Wiring in FTTH", OFC, 2004
M. B. ASTRUC ET AL.: "Trench-Assisted Profiles for Large-Effective-Area Single-Mode Fibers", ECOC, 2008
Attorney, Agent or Firm:
SAKAI, Hiroaki et al. (JP)
Hiroaki Sakai (JP)
Hiroaki Sakai (JP)
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Claims: