PROPAGATION CHARACTERISTIC ANALYSIS DEVICE AND PROPAGATION CHARACTERISTIC ANALYSIS METHOD

WIPO Patent Application WO/2019/167928

A1

This propagation characteristic analysis device uses Brillouin time domain analysis to analyze a propagation characteristic over the length direction of an optical fiber to be analyzed, which is a multiple mode optical fiber for multiplexing multiple modes. The propagation characteristic analysis device is characterized by comprising: a means for inputting probe light of a desired mode from the distal end of the optical fiber to be analyzed; a means for inputting, from the proximal end of the optical fiber to be analyzed, as pump light with respect to the probe light, a light pulse of a desired mode which has a frequency difference corresponding to the Brillouin frequency shift of the desired mode with respect to the probe light; and a means for inputting, from the proximal end of the optical fiber to be analyzed, as second probe light which is probe light with respect to the probe light, a light pulse which is of a mode different from the desired mode and which has, with respect to the probe light, a frequency difference corresponding to the Brillouin frequency shift of the different mode.

TAKAHASHI HIROSHI (JP)
ODA TOMOKAZU (JP)
TOGE KUNIHIRO (JP)
MANABE TETSUYA (JP)

PCT/JP2019/007253

September 06, 2019

February 26, 2019

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NIPPON TELEGRAPH & TELEPHONE (JP)

G01M11/02; H04B10/2581; H04J14/04

JP2017003338A	2017-01-05
US20170310390A1	2017-10-26

KIM ET AL.: "Mapping of intermodal beat length distribution in an elliptical-core two-mode fiber based on Brillouin dynamic grating", OPTICS EXPRESS, vol. 22, no. 14, 9 July 2014 (2014-07-09) - 14 July 2014 (2014-07-14), pages 17292 - 17302, XP055634183

TANI & ABE, P.C. (JP)

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