Title:
OPTICAL FIBER AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2019/017324
Kind Code:
A1
Abstract:
This optical fiber is provided with: a core, a depressed layer surrounding the core; and a clad surrounding the depressed layer, wherein the refractive index distribution of the core is an α-power distribution having an exponent α of 3.5-6, the absolute value |Δ-| of the relative refractive index difference Δ- between the depressed layer and the clad is set to be within 0.01-0.045%, the ratio of the radius r1 of the core to the outer radius r2 of the depressed layer, that is, r1/r2, is set to be within 0.2-0.6, the 22 m cable cutoff wavelength λcc is 1260 nm or less, and the mode field diameter (MFD) at a wavelength of 1310 nm is 8.6-9.5 µm.
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Inventors:
MARUYAMA RYO (JP)
Application Number:
PCT/JP2018/026698
Publication Date:
January 24, 2019
Filing Date:
July 17, 2018
Export Citation:
Assignee:
FUJIKURA LTD (JP)
International Classes:
G02B6/036; C03B37/018; G02B6/028
Domestic Patent References:
| WO2016047749A1 | 2016-03-31 |
Foreign References:
| JP2016518620A | 2016-06-23 | |||
| JP2005202440A | 2005-07-28 | |||
| JP2005115193A | 2005-04-28 | |||
| JP2010271460A | 2010-12-02 | |||
| US20060045450A1 | 2006-03-02 | |||
| JP2017139349A | 2017-08-10 | |||
| JP2018043636A | 2018-03-22 |
Other References:
TATSUO IZAWA: "Japan Society for the Promotion of Science", 26 June 2017, NATIONAL INSTITUTE OF INFORMATICS, article "Research and Development of Vapor-phase Axial Deposition method (VAD method"
"NTT Technical Journal", September 2015, FUJIKURA NEWS
KATSUHIKO OKUBO: "Optical Fiber Technology in the ISDN Era", 1990, RIKOGAKUSHA PUBLISHING CO., LTD., pages: 39 - 10,2-20
See also references of EP 3657223A4
"NTT Technical Journal", September 2015, FUJIKURA NEWS
KATSUHIKO OKUBO: "Optical Fiber Technology in the ISDN Era", 1990, RIKOGAKUSHA PUBLISHING CO., LTD., pages: 39 - 10,2-20
See also references of EP 3657223A4
Attorney, Agent or Firm:
TANAI Sumio et al. (JP)
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