Measurement of mode coupling distribution along a few-mode fiber using a synchronous multi-channel OTDR

Masataka Nakazawa; Masato Yoshida; Toshihiko Hirooka

doi:10.1364/OE.22.031299

Measurement of mode coupling distribution along a few-mode fiber using a synchronous multi-channel OTDR

Masataka Nakazawa, Masato Yoshida, Toshihiko Hirooka

Broadband Engineering Division

Research output: Contribution to journal › Article › peer-review

49 Citations (Scopus)

Abstract

We describe the nondestructive measurement of mode coupling along a few-mode fiber using a synchronous multi-channel optical timedomain reflectometer (OTDR). By installing a few-mode fiber (FMF) coupler made with a phase mask method, we excite the LP₀₁ mode in an FMF under the test as an input mode, and then we detect backward Rayleigh scattered LP_11a or LP_11b modes, which were generated as a result of the mode coupling through the coupler. The mode coupling distribution between the LP₀₁ and LP_11a,b modes along the test FMF was successfully measured with a 10-m spatial resolution by obtaining the ratio between the backscattered LP₀₁ mode and LP_11a or LP_11b. The value of the mode coupling obtained with the present method agreed well with that obtained with the conventional transmission method.

Original language	English
Pages (from-to)	31299-31309
Number of pages	11
Journal	Optics Express
Volume	22
Issue number	25
DOIs	https://doi.org/10.1364/OE.22.031299
Publication status	Published - 2014 Dec 15

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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abstract = "We describe the nondestructive measurement of mode coupling along a few-mode fiber using a synchronous multi-channel optical timedomain reflectometer (OTDR). By installing a few-mode fiber (FMF) coupler made with a phase mask method, we excite the LP01 mode in an FMF under the test as an input mode, and then we detect backward Rayleigh scattered LP11a or LP11b modes, which were generated as a result of the mode coupling through the coupler. The mode coupling distribution between the LP01 and LP11a,b modes along the test FMF was successfully measured with a 10-m spatial resolution by obtaining the ratio between the backscattered LP01 mode and LP11a or LP11b. The value of the mode coupling obtained with the present method agreed well with that obtained with the conventional transmission method.",

author = "Masataka Nakazawa and Masato Yoshida and Toshihiko Hirooka",

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AU - Nakazawa, Masataka

AU - Yoshida, Masato

AU - Hirooka, Toshihiko

PY - 2014/12/15

Y1 - 2014/12/15

N2 - We describe the nondestructive measurement of mode coupling along a few-mode fiber using a synchronous multi-channel optical timedomain reflectometer (OTDR). By installing a few-mode fiber (FMF) coupler made with a phase mask method, we excite the LP01 mode in an FMF under the test as an input mode, and then we detect backward Rayleigh scattered LP11a or LP11b modes, which were generated as a result of the mode coupling through the coupler. The mode coupling distribution between the LP01 and LP11a,b modes along the test FMF was successfully measured with a 10-m spatial resolution by obtaining the ratio between the backscattered LP01 mode and LP11a or LP11b. The value of the mode coupling obtained with the present method agreed well with that obtained with the conventional transmission method.

AB - We describe the nondestructive measurement of mode coupling along a few-mode fiber using a synchronous multi-channel optical timedomain reflectometer (OTDR). By installing a few-mode fiber (FMF) coupler made with a phase mask method, we excite the LP01 mode in an FMF under the test as an input mode, and then we detect backward Rayleigh scattered LP11a or LP11b modes, which were generated as a result of the mode coupling through the coupler. The mode coupling distribution between the LP01 and LP11a,b modes along the test FMF was successfully measured with a 10-m spatial resolution by obtaining the ratio between the backscattered LP01 mode and LP11a or LP11b. The value of the mode coupling obtained with the present method agreed well with that obtained with the conventional transmission method.

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Measurement of mode coupling distribution along a few-mode fiber using a synchronous multi-channel OTDR

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