Design considerations for magnetic field generators for future switching applications

Widespread adoption of Magnetic Field Generators (MFG) will require most electro-optical systems to incorporate high current devices, thereby demanding decreased power consumption due to loss reduction. Recent progress in magnetic field generator typologies has shown ways of reducing form factor while meeting better performance in terms of max current and magnetic field level based on selected transistor technologies. However, developments in the standardization of MFGs need to be considered for optoelectronic industrial-scale applications. This work describes a strategy for identifying the optimum condition for a high magnetic field, form factors contributing to power consumption, and the feasibility of such magneto optical.This article is published as Bouda, N. Robert, N. Prabhu Gaunkar, W. Shen Theh, and M. Mina. "Design considerations for magnetic field generators for future switching applications." AIP Advances 14, no. 2 (2024). doi: https://doi.org/10.1063/9.0000698. © 2024 Author(s). This is an open access article licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/)

Optimization of sensor design for Barkhausen noise measurement using finite element analysis

The effects of design parameters for optimizing the performance of sensors for magneticBarkhausen emission measurement are presented. This study was performed using finite element analysis. The design parameters investigated include core material, core-tip curvature, core length, and pole spacing. Considering a combination of permeability and saturation magnetization, iron was selected as the core material among other materials investigated. Although a flat core-tip would result in higher magnetic flux concentration in the test specimen, a curved core-tip is preferred. The sensor-to-specimen coupling is thereby improved especially for materials with different surface geometries. Smaller pole spacing resulted in higher flux concentration

Analysis of ringing effects due to magnetic core materials in pulsed nuclear magnetic resonance circuits

This work presents investigations and detailed analysis of ringing in a non-resonant pulsednuclear magnetic resonance (NMR) circuit. Ringing is a commonly observed phenomenon in high power switching circuits. The oscillations described as ringing impede measurements in pulsed NMR systems. It is therefore desirable that those oscillations decay fast. It is often assumed that one of the causes behind ringing is the role of the magnetic core used in theantenna (acting as an inductive load). We will demonstrate that an LRC subcircuit is also set-up due to the inductive load and needs to be considered due to its parasitic effects. It is observed that the parasitics associated with the inductive load become important at certain frequencies. The output response can be related to the response of an under-damped circuit and to the magnetic core material. This research work demonstrates and discusses ways of controlling ringing by considering interrelationships between different contributing factors

GaN-based fast, high output magnetic field pulser

Magnetic field pulsers (MFP) generate a pulsed magnetic field by driving current through an inductor. These pulsers have numerous applications based on the output magnetic flux density and switching time. This investigation will explore the application of gallium nitride-based (GaN) transistor in a MFP design. Based on the advantages of GaN transistors, the investigation looks towards creating a pulser capable of producing magnetic flux density of 500 Gauss with a rise/fall time of less than 500 nanoseconds. This investigation will improve upon findings from prior pulsers designed for magneto-optic switching applications. Simulation results have shown that for a given maximum current level, the GaN transistor pulser displays steeper rise and fall time when compared to a pulser employing a Si transistor. This result further highlights the potential of GaN transistor as the switching device where rapid field switching is preferable.This article is published as Theha, W.S., Gaunkar, N.P., Mina, M., GaN-based fast, high output magnetic field pulser. AIP Advances. Feb 2021, 11(2); 025118. DOI: 10.1063/9.0000210.</p

Design considerations for magnetic field generators for future switching applications

Widespread adoption of Magnetic Field Generators (MFG) will require most electro-optical systems to incorporate high current devices, thereby demanding decreased power consumption due to loss reduction. Recent progress in magnetic field generator typologies has shown ways of reducing form factor while meeting better performance in terms of max current and magnetic field level based on selected transistor technologies. However, developments in the standardization of MFGs need to be considered for optoelectronic industrial-scale applications. This work describes a strategy for identifying the optimum condition for a high magnetic field, form factors contributing to power consumption, and the feasibility of such magneto optical

Magneto-optic interferometric system: Exploring building blocks and subcircuits

Recent developments in the standardization of magnetic field generators have been considered for optoelectronic industrial-scale applications. In this work, a strategy to incorporate all optical components that can be used to implement a broad range of functions for communications applications is presented. We propose a circuit design for a magneto-optic interferometric system based on building blocks and subcircuits consisting of an interferometer with magneto-optic phase shifters and a magnetic field generator. The paper shows the building blocks based on elementary 2 × 2 photonics coupling components. We demonstrate that such a design can be configured as a tunable system based on the phase shift experienced by the incoming signals from two input waveguides and their transitions.This proceeding article published as Bouda, N. Robert, N. Prabhu Gaunkar, W. Shen Theh, and M. Mina. "Magneto-optic interferometric system: Exploring building blocks and subcircuits." AIP Advances 14, no. 2 (2024). doi: https://doi.org/10.1063/9.0000704. © 2024 Author(s). This is an open access article licensed under a Creative Commons Attribution (CC BY) license http://creativecommons.org/licenses/by/4.0/

A typology for magnetic field generator technologies

This paper identifies different methodologies used to design suitable magnetic field generators (MFG) with adjustable characteristics. Variations in parameters, such as pulse frequency and amplitude elicit distinct responses. Assessing the differences between design parameters and experimental observations of magnetic field generators is essential for various applications. The use of magnetic field generator-based techniques is first studied in applications related to optical transmission, transcranial magnetic stimulation devices and magnetic resonance. Decades of research and technological advancement are associated with these methods. The associated nomenclature for describing and characterizing these methods are introduced and discussed. Finally, the paper presents possible future framework and design considerations in functionality where new MFGs are expected to play a key role in the future.This article is published as Boudaa, N.R.Y., Gaunkar, N.P., Theh, W.S., Mina, M., A typology for magnetic field generator technologies. AIP Advances Jan 5 2021, 11; 015103,doi: 10.1063/9.0000046.</p

Magneto-optic interferometric system: Exploring building blocks and subcircuits

Recent developments in the standardization of magnetic field generators have been considered for optoelectronic industrial-scale applications. In this work, a strategy to incorporate all optical components that can be used to implement a broad range of functions for communications applications is presented. We propose a circuit design for a magneto-optic interferometric system based on building blocks and subcircuits consisting of an interferometer with magneto-optic phase shifters and a magnetic field generator. The paper shows the building blocks based on elementary 2 × 2 photonics coupling components. We demonstrate that such a design can be configured as a tunable system based on the phase shift experienced by the incoming signals from two input waveguides and their transitions