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Paper Abstract and Keywords
Presentation 2018-07-26 13:35
[Invited Talk] Study on modulation system for optical probe high-frequency magnetic field measurement
Kazushi Ishiyama (Tohoku Univ.)
Abstract (in Japanese) (See Japanese page) 
(in English) Measuring magnetic near field is one of the key technologies against the problem of the electromagnetic interference (EMI). However the previous methods generally use metal probes and cables. Therefore the accuracy of the system is poor by the many unexpected couplings between the metals and the measuring magnetic fields. Measurements that use the magneto-optical effect can overcome this problem. The magneto-optical measurements do not use any metallic materials and cables, therefore it has very small invasive for the magnetic fields. To achieve a high resolution, a stroboscopic method that employs short laser pulses are utilized. To improve the sensitivity, a new modulation system was carried out. Two waveforms having same frequency and different phase are used for modulate the pulsed laser. By switching the waveforms, modulated signal can obtained. Therefore the measured signal can be enlarged using the Lock-in amplifier. As a result, the proposed system can visualized RF magnetic near-field around IC chips.
Keyword (in Japanese) (See Japanese page) 
(in English) High frequency magnetic near field / optical probe / low invasive / / / / /  
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Conference Information
Committee EMCJ IEE-SPC EMD PEM  
Conference Date 2018-07-26 - 2018-07-26 
Place (in Japanese) (See Japanese page) 
Place (in English) Kikai-Shinko-Kaikan Bldg. 
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Paper Information
Registration To PEM 
Conference Code 2018-07-EMCJ-SPC-EMD-PEM 
Language Japanese 
Title (in Japanese) (See Japanese page) 
Sub Title (in Japanese) (See Japanese page) 
Title (in English) Study on modulation system for optical probe high-frequency magnetic field measurement 
Sub Title (in English)  
Keyword(1) High frequency magnetic near field  
Keyword(2) optical probe  
Keyword(3) low invasive  
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1st Author's Name Kazushi Ishiyama  
1st Author's Affiliation Tohoku University (Tohoku Univ.)
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Speaker Author-1 
Date Time 2018-07-26 13:35:00 
Presentation Time 25 minutes 
Registration for PEM 
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Volume (vol) vol.118 
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