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Title:
MULTICORE OPTICAL FIBER AND MULTICORE OPTICAL FIBER CABLE
Document Type and Number:
WIPO Patent Application WO/2019/198365
Kind Code:
A1
Abstract:
An MCF cable according to an embodiment contains a plurality of MCFs each including at least one coupled core group and common cladding. Λ is set such that κ at a wavelength of 1550 nm is between 1 × 10-1 [m-1] and 1 × 103 [m-1], inclusive, and (βΛCavg) / (2κ) or (βΛCf) / (2κ) is set in a specific range between the wavelengths 1530 nm and 1625 nm, inclusive, where Cavg [m-1], Cf [m-1], ftwist [turn / m] represent the average of the curvature, the imaginary curvature, and the average torsion respectively for each MCF, and κ[m-1], β[m-1], Λ[m] represent the mode coupling coefficient between adjacent cores, the average of propagation constants, and the distance between core centers respectively.

Inventors:
HAYASHI TETSUYA (JP)
Application Number:
JP2019/007637
Publication Date:
October 17, 2019
Filing Date:
February 27, 2019
Export Citation:
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Assignee:
SUMITOMO ELECTRIC INDUSTRIES (JP)
International Classes:
G02B6/44; G02B6/02
Domestic Patent References:
WO2017061184A12017-04-13
WO2013161825A12013-10-31
Foreign References:
US20170227410A12017-08-10
JP2018074674A2018-05-10
Other References:
SAKAMOTO ET AL.: "Fiber Twisting- and Bending-Induced Adiabatic/Nonadiabatic Super-Mode Transition in Coupled Multicore Fiber", JOURNAL OF LIGHTWAVE TECHNOLOGY, vol. 34, no. 4, 15 February 2016 (2016-02-15), pages 1228 - 1237, XP011598880, DOI: 10.1109/JLT.2015.2502260
TAIJI SAKAMOTO; SHINICHI AOZASA; TAKAYOSHI MORI; MASAKI WADA; TAKASHI YAMAMOTO; SAKI NOZOE; YUTO SAGAE; KYOZO TSUJIKAWA; KAZUHIDE : "B-13-25 High spatial density randomly-coupled 12-core fiber", PROCEEDINGS OF THE SOCIETY CONFERENCE 2 OF THE IEICE TECHNICAL REPORT 2017; MARCH 22ND TO 25TH, 2017, B-13-25, 22 March 2017 (2017-03-22), pages 386, XP009523747
JLT, vol. 34, no. 4, 2016, pages 1228
S. FANJ. M. KAHN: "Principal modes in multimode waveguides", OPT. LETT., vol. 30, no. 2, 2005, pages 135 - 137
M. KOSHIBAK. SAITOHK. TAKENAGAS. MATSUO: "Analytical expression of average power-coupling coefficients for estimating intercore crosstalk in multicore fibers", IEEE PHOTON. J., vol. 4, no. 5, 2012, pages 1987 - 1995
T. HAYASHIT. SASAKIE. SASAOKAK. SAITOHM. KOSHIBA: "Physical interpretation of intercore crosstalk in multicore fiber:effects of macrobend, structure fluctuation, and microbend", OPT. EXPRESS, vol. 21, no. 5, 2013, pages 5401 - 5412, XP055506563, DOI: 10.1364/OE.21.005401
T. SAKAMOTOT. MORIM. WADAT. YAMAMOTOF. YAMAMOTOK. NAKAJIMA: "Fiber twisting and bending induced adiabatic/nonadiabatic super-mode transition in coupled multi-core fiber.", J. LIGHTW. TECHNOL., vol. 34, no. 4, February 2016 (2016-02-01), pages 1228 - 1237
Attorney, Agent or Firm:
HASEGAWA Yoshiki et al. (JP)
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