Measuring method of longitudinal distribution of bending loss of optical fiber, measuring method of longitudinal distribution of actual bending loss value of optical fiber, test method of optical line, manufacturing method of optical fiber cable, manufacturing method of optical fiber cord, and manufacturing method of optical fiber

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United States of America Patent

PATENT NO 9562827
APP PUB NO 20120042696A1
SERIAL NO

13213506

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Abstract

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A measuring method of a longitudinal distribution of bending loss of an optical fiber includes calculating an arithmetical mean value I(x) from two backscattering light intensities of two backscattering light at a position x obtained by bidirectional OTDR measurement of the optical fiber; and obtaining a bending loss value at the position x from a mode field diameter 2W(x) and a relative refractive index difference Δ(x) at the position x calculated from the arithmetical mean value.

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Patent Owner(s)

  • FUJIKURA LTD.;NIPPON TELEGRAPH AND TELEPHONE CORPORATION

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Goto, Yukihiro Tsukuba, JP 28 161
Ishida, Itaru Sakura, JP 19 56
Kurashima, Toshio Tsukuba, JP 15 131
Matsui, Takashi Tsukuba, JP 222 2309
Matsuo, Shoichiro Sakura, JP 66 884
Nakajima, Kazuhide Tsukuba, JP 65 99
Shimizu, Tomoya Tsukuba, JP 47 120
Tanigawa, Shoji Sakura, JP 29 952

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