Mr. Rafal Bialek Profile

Rafal Bialek

at Wojskowa Akademia Techniczna

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Proceedings Article | 27 March 2019 Paper

Testing of the detector based on the Faraday effect for the detection of high-power electromagnetic pulses

R. Białek, M. Kuchta

Proceedings Volume 11055, 110550H (2019) https://doi.org/10.1117/12.2524562

KEYWORDS: Sensors, Electromagnetism, Magnetism, Signal detection, Magnetic sensors, Photodiodes, Polarizers, Optoelectronics, Dielectrics, Transducers

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Currently, high-power electromagnetic pulses are detected through antennas with conductive elements, which can causing the measured wave to interfere with waves reflected from metal elements. Moreover, they are characterized by a strongly non-linear frequency nature. Additional measuring system elements, such as a balun, attenuators, a limiter, which also impact the transmittance of the entire system are also used frequently. Appropriate selection of attenuation values when testing electromagnetic signals with unknown parameters is also problematic. An important aspect is also ensuring adequate detector resistance to the impact of high-power electromagnetic pulses. The paper discusses the test results for a prototype optoelectronic transducer based on the Faraday effect. The detector is designed in the fully dielectric technology. The system enables detecting a magnetic component of an electromagnetic field. Very similar amplitude values and signal shapes were obtained during the first tests involving the recording of system responses upon harmonic excitations with selected frequencies. The transfer characteristics for selected optical signal wavelengths (660 nm and 880 nm) were also measured, and a system response upon magnetic field pulse excitation was also recorded. Based on the measurements taken when determining the transfer characteristics, the linear correlation coefficients for a system operating at various optical light wavelengths were calculated. The incidence results also showed the need to conduct further studies in terms of increasing the sensitivity of the constructed detector. The disturbance level on the detector output should also be limited.

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