Optimization of a Radio-frequency Atomic Magnetometer Toward Very Low Frequency Signal Reception

We describe a single-channel rubidium (Rb) radio-frequency atomic magnetometer (RFAM) as a receiver that takes magnetic signal resonating with Zeeman splitting of the ground state of Rb. We optimize the performance of the RFAM by recording the response signal and signal-to-noise ratio (SNR) in vario...

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Bibliographic Details
Published in:Current optics and photonics 2021, 5(3), , pp.213-219
Main Authors: Lee, Hyun Joon, Yu, Ye Jin, Kim, Jang-Yeol, Lee, Jaewoo, Moon, Han Seb, Cho, In-Kui
Format: Article
Language:English
Subjects:
Magnetic signals
Magnetometers
Noise levels
Optimization
Radio frequency
Rubidium
Signal reception
Signal to noise ratio
Very Low Frequencies
Zeeman effect
물리학
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Summary:We describe a single-channel rubidium (Rb) radio-frequency atomic magnetometer (RFAM) as a receiver that takes magnetic signal resonating with Zeeman splitting of the ground state of Rb. We optimize the performance of the RFAM by recording the response signal and signal-to-noise ratio (SNR) in various parameters and obtain a noise level of 159 fT/√Hz around 30 kHz. When a resonant radio-frequency magnetic field with a peak amplitude of 8.0 nT is applied, the bandwidth and signal-to-noise ratio are about 650 Hz and 88 dB, respectively. It is a good agreement that RFAM using alkali atoms is suitable for receiving signals in the very low frequency (VLF) carrier band, ranging from 3 kHz to 30 kHz. This study shows the new capabilities of the RFAM in communications applications based on magnetic signals with the VLF carrier band. Such communication can be expected to expand the communication space by overcoming obstacles through the high magnetic sensitive RFAM
ISSN:2508-7266
2508-7274
DOI:10.3807/COPP.2021.5.3.213