Influence of the optical fiber type on the performances of fiber-optics current sensor dedicated to plasma current measurement in ITER

Matthieu Aerssens; Frédéric Descamps; Andrei Goussarov; Patrice Mégret; Philippe Moreau; Marc Wuilpart

doi:10.1364/AO.54.005983

Influence of the optical fiber type on the performances of fiber-optics current sensor dedicated to plasma current measurement in ITER

Matthieu Aerssens, Frédéric Descamps, Andrei Goussarov, Patrice Mégret, Philippe Moreau, Marc Wuilpart

Research output › peer-review

32 Scopus citations

Abstract

In this paper, we compare, by means of simulations using the Jones formalism, the performances of several optical fiber types (low birefringence and spun fibers) for the measurement of plasma current in international thermonuclear experimental reactor (ITER). The main results presented in this paper concern the minimum value of the ratio between the beat length and the spun period, which allows meeting the ITER current measurement specifications. Assuming a high-birefringence spun fiber with a beat length of 3 mm, we demonstrate that the minimum ratio between the beat length and the spun period is 4.4 when considering a 28 m long sensing fiber surrounding the vacuum vessel. This minimum ratio rises to 10.14 when a 100 m long lead fiber connecting the interrogating system to the sensing fiber is taken into account.

Original language	English
Pages (from-to)	5983-5991
Number of pages	9
Journal	Applied Optics
Volume	54
Issue number	19
DOIs	https://doi.org/10.1364/AO.54.005983
State	Published - 1 Jul 2015

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
Engineering (miscellaneous)
Electrical and Electronic Engineering

Access to Document

10.1364/AO.54.005983

Cite this

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abstract = "In this paper, we compare, by means of simulations using the Jones formalism, the performances of several optical fiber types (low birefringence and spun fibers) for the measurement of plasma current in international thermonuclear experimental reactor (ITER). The main results presented in this paper concern the minimum value of the ratio between the beat length and the spun period, which allows meeting the ITER current measurement specifications. Assuming a high-birefringence spun fiber with a beat length of 3 mm, we demonstrate that the minimum ratio between the beat length and the spun period is 4.4 when considering a 28 m long sensing fiber surrounding the vacuum vessel. This minimum ratio rises to 10.14 when a 100 m long lead fiber connecting the interrogating system to the sensing fiber is taken into account.",

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AU - Aerssens, Matthieu

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AU - Moreau, Philippe

AU - Wuilpart, Marc

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