Stroboscopic Technique for Measuring Magnetic-Field Waveforms Utilizing Magneto-Optical Effect

Electromagnetic interference (EMI) is a serious problem in integrated circuits (ICs). Many methods for measuring EMI have been developed. These methods generally use metal probes to measure electromagnetic waves; however, metal probes alter the electromagnetic field. Furthermore, measurement techniq...

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Bibliographic Details
Published in:IEEE transactions on magnetics 2011-10, Vol.47 (10), p.4011-4013
Main Authors: Nasuno, Hiroshi, Hashi, Shuichiro, Ishiyama, Kazushi
Format: Article
Language:English
Subjects:
Cross-disciplinary physics: materials science
rheology
Electromagnetic compatibility
Exact sciences and technology
Frequency measurement
Magnetic noise
Magnetic resonance imaging
Magnetic shielding
magnetic-field measurement
magneto-optical effect
Materials science
Measurement by laser beam
Other topics in materials science
Phase measurement
Physics
Transmission line measurements
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Summary:Electromagnetic interference (EMI) is a serious problem in integrated circuits (ICs). Many methods for measuring EMI have been developed. These methods generally use metal probes to measure electromagnetic waves; however, metal probes alter the electromagnetic field. Furthermore, measurement techniques that have very high time resolutions are required because of the high operating frequencies of ICs. Measurements that use the magneto-optical effect can overcome both these problems. Magneto-optical materials affect electromagnetic waves less than metal probes and optical measurements are advantageous for minimally invasive measurements of magnetic fields. To achieve a high resolution, we developed a stroboscopic method that employs short laser pulses. This method can measure a magnetic field in any phase because the laser pulses are synchronized with the magnetic field. Measurements of magnetic-field waveforms demonstrated that this stroboscopic method is effective for measuring magnetic-field waveforms.
ISSN:0018-9464
1941-0069
DOI:10.1109/TMAG.2011.2147775