Visualization of an electromagnetic field distribution is helpful for spatial evaluation of field leakage and can aid in solving inverse problems of signal-source estimation. Optical detection is more accurate and less invasive than other methods owing to a low metal content in the sensing probes and signal wires. We have previously reported optical detection of alternating magnetic fields using an alkali-metal atomic magnetometer. In this study, we have proposed a method for imaging the field in a 10 mm diameter area in the sensor head and achieved a resolution below 0.3 mm using a digital micro-mirror device. In this paper, we demonstrate the visualization of an alternating magnetic field at 70 kHz, generated using a Helmholtz coil and a 0.5-mm diameter metal wire attached to the sensor head. Both the uniform field image from the coil and the gradient field image from the wire were clearly observed. The output linearity of the magnetometer was investigated by varying the electric current applied to the coil. In addition, we performed signal-source estimation from the gradient field image. The obtained and calculated distributions were compared to estimate the position of the wire. The estimated wire depth of 1.41 mm was within the range of actual wire depths. This measurement technique has the potential for application in precise position estimation of signal sources with high sensitivity.
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International Telecommunication Union: Nomenclature of the frequency and wavelength bands used in telecommunications. https://www.itu.int/dms_pubrec/itu-r/rec/v/R-REC-V.431-8-201508-I!!PDF-E.pdf, (2015). Accessed 15 October 2019
Electronic Communications Committee, ECC Report 289: Wireless Power Transmission (WPT) systems for electrical vehicles (EV) operating within 79–90 kHz band, (2019).
Takahashi, M., Ota, H., Arai, K., Sato, R.: Magnetic near-field distribution measurements above a patch antenna by using an optical waveguide probe. IEICE Trans. Commun. E88-B(8), 3140 (2005)
Hisatake, S., Pham, H.H.N., Nagatsuma, T.: Visualization of the spatial–temporal evolution of continuous electromagnetic waves in the terahertz range based on photonics technology. Optica 1(6), 365–371 (2014)
Appel, P., Ganzhorn, M., Neu, E., Maletinsky, P.: Nanoscale microwave imaging with a single electron spin in diamond. New J. Phys. 17(11), 112001 (2015)
Yang, B., Dong, Y., Hu, Z.-Z., Liu, G.-Q., Wang, Y.-J., Du, G.-X.: Noninvasive imaging method of microwave near field based on solid-state quantum sensing. IEEE Trans. Microw. Theo. Techn. 66(5), 2276–2283 (2018)
Kinoshita, M., Ishii, M.: Visualization of radio-frequency waves via double resonance spectroscopy of cesium atoms. Jpn. J. Appl. Phys. 55, 052004 (2019)
Wickenbrock, A., Leefer, N., Blanchard, J.W., Budker, D.: Eddy current imaging with an atomic radio-frequency magnetometer. Appl. Phys. Lett. 108, 183507 (2016)
Deans, C., Marmugi, L., Hussain, S., Renzoni, F.: Electromagnetic induction imaging with a radio-frequency atomic magnetometer. Appl. Phys. Lett. 108, 103503 (2016)
Bevington, P., Gartman, R., Chalupczak, W., Deans, C., Marmugi, L., Renzoni, F.: Non-destructive structural imaging of steelwork with atomic magnetometers. Appl. Phys. Lett. 113, 063503 (2018)
Marmugi, L., Renzoni, F.: Optical magnetic induction tomography of the heart. Sci. Rep. 6, 23962 (2016)
Colombo, S., Lebedev, V., Tonyushkinb, A., Grujic, Z.D., Dolgovskiy, V., Weis, A.: Towards a mechanical MPI scanner based on atomic magnetometry. Int. J. Magn. Part. Image 3(1), 1703006 (2017)
Dolgovskiy, V., Fescenko, I., Sekiguchi, N., Colombo, S., Lebedev, V., Zhang, J., Weis, A.: A magnetic source imaging camera. Appl. Phys. Lett. 109, 023505 (2016)
Taue, S., Shinohara, M., Toyota, Y., Fujimori, K., Fukano, H.: Optically pumped atomic magnetometer for AC magnetic field—calibration of output signals and utilizing permanent magnets. IEICE Trans. Commun. (Jpn Ed) J100-B(3), 158–165 (2017)
Taue S., Toyota, Y., Fujimori, K., Fukano, H.: AC magnetic field imaging by using digital micro-mirror device. In: Microoptics Conference (The Japan Society of Applied Physics), pp. 212–213 (2017)
Taue, S., Arita, N., and Toyota, Y.: AC magnetic field imaging by using atomic magnetometer and micro-mirror device. In: Proc. of the 2019 International Symposium on Electromagnetic Compatibility (EMC Europe), pp. 253–256 (2019)
Alexandrov, E.B., Vershovskiy, A.K.: Mx and Mz magnetometer. In: Budker, D., Kimball, D.F.J. (eds.) Optical Magnetometry, pp. 60–84. Cambridge University Press, Cambridge (2013)
Happer, W.: Optical pumping. Rev. Mod. Phys. 44, 169–249 (1972)
Groeger, S., Pazgalev, A.S., Weis, A.: Comparison discharge lamp and laser pumped cesium magnetometer. Appl. Phys. B 80, 645–654 (2005)
Udem, Th, Reichert, J., Hänsch, T.W., Kourogi, M.: Absolute optical frequency measurement of te cesium D2 line. Phys. Rev. A 62, 031801(R) (2000)
Groeger, S., Bison, G., Schenker, J.-L., Wynands, R.: A high-sensitivity laser-pumped Mx magnetometer. Eur. Phys. J. D 38(2), 239–247 (2006)
This work was supported by the Telecommunications Advancement Foundation, JSPS KAKENHI Grant Number JP18K04166, and Konica Minolta Science and Technology Foundation.
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Taue, S., Toyota, Y. Signal-source estimation from magnetic field image obtained using atomic magnetometer and digital micro-mirror device. Opt Rev 27, 258–263 (2020). https://doi.org/10.1007/s10043-020-00591-y
- Position estimation
- Atomic magnetometer
- Electromagnetic interference