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 outputpeer-review

    32 Scopus citations


    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 languageEnglish
    Pages (from-to)5983-5991
    Number of pages9
    JournalApplied Optics
    Issue number19
    StatePublished - 1 Jul 2015

    ASJC Scopus subject areas

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

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