High-Dynamic and High-Precise Optical Current Measurement System Based on the Faraday Effect

Gerber, Dominic; Biela, J.

doi:10.1109/tps.2015.2437395

Cited by 14 publications

(14 citation statements)

References 15 publications

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“…Bandwidth depends on FM thickness and dopant concentration. FOSs cannot equal FM bandwidth [ 213 ], but device bandwidths of 10 MHz [ 212 ] or more [ 60 ] have been reported, enabling FE-based sensors to compete for exotic applications [ 211 , 214 ]. The magnetic concentrator spoils bandwidth of extrinsic OCTs, but 10 kHz is easily achievable.…”

Section: Discussionmentioning

confidence: 99%

Fiber Optic Sensors Based on the Faraday Effect

Mihailović

Petričević

2021

Sensors

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Some 175 years ago Michael Faraday discovered magnetic circular birefringence, now commonly known as the Faraday effect. Sensing the magnetic field through the influence that the field has on light within the fiber optic sensor offers several advantages, one of them fundamental. These advantages find application in the measurement of electric current at high voltages by measuring the induced magnetic field, thus warranting application for this kind of fiber optic sensor (FOS) in future smart grids. Difficulties in designing and manufacturing high-performance FOSs were greatly alleviated by developments in optical telecommunication technology, thus giving new impetus to magnetometry based on the Faraday effect. Some of the major problems in the processing of optical signals and temperature dependence have been resolved, yet much effort is still needed to implement all solutions into a single commercial device. Artificial structures with giant Faraday rotation, reported in the literature in the 21st century, will further improve the performance of FOSs based on the Faraday effect. This paper will consider obstacles and limits imposed by the available technology and review solutions proposed so far for fiber optic sensors based on the Faraday effect.

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Section: Discussionmentioning

confidence: 99%

Fiber Optic Sensors Based on the Faraday Effect

Mihailović

Petričević

2021

Sensors

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“…Sensors with periodic output could perform dynamic range folding, effectively relieving the ADC bottleneck. This approach has been demonstrated with SQUIDs [4] [30], and has been proposed for magneto-optical current sensors based on the Faraday effect [31].…”

Section: Discussionmentioning

confidence: 99%

Analog-to-digital conversion beyond 20 bits

Beev

2018

2018 IEEE International Instrumentation and Measurement Technology Conference (I2MTC)

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Analog-to-digital converters with resolution exceeding 20 bits are widely available today. They exist in two forms-flexible laboratory instruments and monolithic integrated circuits. We present an overview of application fields for such digitizers, the hardware architectures that implement them, and their limitations. We review the state of the art by comparing the best-performing devices reported in scientific literature, as well as those available commercially. Our focus is particularly on integrated circuit solutions, and among our aims are the disambiguation of the multiple performance metrics in use, as well as the presentation of a clear perspective on basic performance tradeoffs. Finally, we provide a discussion on the future prospects for highresolution digitizing measurement systems.

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“…K g is defined as the geometry factor to model the relation between the current I m and the magnetic field H opt in the MOCS. In [1], [2], and [3], concepts for optical current measurement systems based on multiple full rotations of the plane of polarisation (Faraday rotation Θ F > 180 • ) have been proposed. With a high optical rotation angle Θ F , a higher precision and a higher sensitivity can be achieved compared to concepts with less than 90 • rotation angle.…”

Section: Introductionmentioning

confidence: 99%

Modelling and Design Optimisation of a High Bandwidth and High Precision Optical Current Sensor Based on the Faraday Effect

Rietmann

Schlesinger

Biela

2021

2021 23rd European Conference on Power Electronics and Applications (EPE'21 ECCE Europe)

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A magneto-optical current measurement system based on the Faraday effect is evaluated for measuring fast pulse currents in high power applications. The current measurement system is based on the interaction of the magnetic field, generated by the current, and a beam of light propagating through magneto-optical material which is in close proximity to the current conductor. A high local magnetic field per ampère current inside the optical path is required to improve the accuracy and the sensitivity of the optical current measurement sensor. In this paper, the relation between the conductor geometry and the local magnetic field distribution is analytically modelled resulting in the geometry factor K g . The analytical model enables an optimisation of the busbar geometry to increase the overall probe sensitivity and the accuracy of the optical current measurement system.

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High-Dynamic and High-Precise Optical Current Measurement System Based on the Faraday Effect

Cited by 14 publications

References 15 publications

Fiber Optic Sensors Based on the Faraday Effect

Fiber Optic Sensors Based on the Faraday Effect

Analog-to-digital conversion beyond 20 bits

Modelling and Design Optimisation of a High Bandwidth and High Precision Optical Current Sensor Based on the Faraday Effect

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