Transfer function of mode-coupled graded-index multimode optical fibers is given theoretically with an algebraic method, which can be applied to arbitrary index profile and distance. Using the transfer function thus obtained, the relation between the transmission characteristics and the mode coupling due to the random bending of the fiber axis is investigated. As a result it is shown that the length-dependent transmission characteristics such as frequency characteristics, coupling-induced loss and bandwidth can be represented in a unified manner using the coupling length defined in this paper. The frequency characteristics is determined dominantly by the ratio of the fiber length to the coupling length. Further, the length dependencies of both the bandwidth and the coupling-induced loss are represented by a normalized form which does not depend upon the index profile. For the distance which is far from the coupling length, the bandwidth is inversely proportional to the square root of the product of the fiber length and the coupling length, and the coupling-induced loss is proportional to the ratio of the fiber length to the coupling length.
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Yasuharu SUEMATSU, Hideharu TOKIWA, "Transmission Characteristics of Model-Coupled Graded-Index Multimode Optical Fibers" in IEICE TRANSACTIONS on transactions,
vol. E61-E, no. 5, pp. 355-362, May 1978, doi: .
Abstract: Transfer function of mode-coupled graded-index multimode optical fibers is given theoretically with an algebraic method, which can be applied to arbitrary index profile and distance. Using the transfer function thus obtained, the relation between the transmission characteristics and the mode coupling due to the random bending of the fiber axis is investigated. As a result it is shown that the length-dependent transmission characteristics such as frequency characteristics, coupling-induced loss and bandwidth can be represented in a unified manner using the coupling length defined in this paper. The frequency characteristics is determined dominantly by the ratio of the fiber length to the coupling length. Further, the length dependencies of both the bandwidth and the coupling-induced loss are represented by a normalized form which does not depend upon the index profile. For the distance which is far from the coupling length, the bandwidth is inversely proportional to the square root of the product of the fiber length and the coupling length, and the coupling-induced loss is proportional to the ratio of the fiber length to the coupling length.
URL: https://global.ieice.org/en_transactions/transactions/10.1587/e61-e_5_355/_p
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@ARTICLE{e61-e_5_355,
author={Yasuharu SUEMATSU, Hideharu TOKIWA, },
journal={IEICE TRANSACTIONS on transactions},
title={Transmission Characteristics of Model-Coupled Graded-Index Multimode Optical Fibers},
year={1978},
volume={E61-E},
number={5},
pages={355-362},
abstract={Transfer function of mode-coupled graded-index multimode optical fibers is given theoretically with an algebraic method, which can be applied to arbitrary index profile and distance. Using the transfer function thus obtained, the relation between the transmission characteristics and the mode coupling due to the random bending of the fiber axis is investigated. As a result it is shown that the length-dependent transmission characteristics such as frequency characteristics, coupling-induced loss and bandwidth can be represented in a unified manner using the coupling length defined in this paper. The frequency characteristics is determined dominantly by the ratio of the fiber length to the coupling length. Further, the length dependencies of both the bandwidth and the coupling-induced loss are represented by a normalized form which does not depend upon the index profile. For the distance which is far from the coupling length, the bandwidth is inversely proportional to the square root of the product of the fiber length and the coupling length, and the coupling-induced loss is proportional to the ratio of the fiber length to the coupling length.},
keywords={},
doi={},
ISSN={},
month={May},}
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TY - JOUR
TI - Transmission Characteristics of Model-Coupled Graded-Index Multimode Optical Fibers
T2 - IEICE TRANSACTIONS on transactions
SP - 355
EP - 362
AU - Yasuharu SUEMATSU
AU - Hideharu TOKIWA
PY - 1978
DO -
JO - IEICE TRANSACTIONS on transactions
SN -
VL - E61-E
IS - 5
JA - IEICE TRANSACTIONS on transactions
Y1 - May 1978
AB - Transfer function of mode-coupled graded-index multimode optical fibers is given theoretically with an algebraic method, which can be applied to arbitrary index profile and distance. Using the transfer function thus obtained, the relation between the transmission characteristics and the mode coupling due to the random bending of the fiber axis is investigated. As a result it is shown that the length-dependent transmission characteristics such as frequency characteristics, coupling-induced loss and bandwidth can be represented in a unified manner using the coupling length defined in this paper. The frequency characteristics is determined dominantly by the ratio of the fiber length to the coupling length. Further, the length dependencies of both the bandwidth and the coupling-induced loss are represented by a normalized form which does not depend upon the index profile. For the distance which is far from the coupling length, the bandwidth is inversely proportional to the square root of the product of the fiber length and the coupling length, and the coupling-induced loss is proportional to the ratio of the fiber length to the coupling length.
ER -