Towards a Practical Implementation of a Single-Beam All-Optical Non-Zero-Field Magnetic Sensor for Magnetoencephalographic Complexes

Autor:	Anton Vershovskii, Mikhail Petrenko
Jazyk:	angličtina
Rok vydání:	2022
Předmět:	Magnetocardiography Magnetics Light Magnetoencephalography Optical Devices optically detected magnetic resonance quantum magnetometer magnetoencephalography Electrical and Electronic Engineering Biochemistry Instrumentation Atomic and Molecular Physics and Optics Analytical Chemistry
Zdroj:	Sensors; Volume 22; Issue 24; Pages: 9862
ISSN:	1424-8220
DOI:	10.3390/s22249862
Popis:	We present a single-beam all-optical two-channel magnetic sensor scheme developed for biological applications such as non-zero-field magnetoencephalography and magnetocardiography. The pumping, excitation and detection of magnetic resonance in two cells are performed using a single laser beam with time-modulated linear polarization: the linear polarization of the beam switches to orthogonal every half-cycle of the Larmor frequency. Light with such characteristics can be transmitted over a single-mode polarization-maintaining fiber without any loss in the quality of the polarization characteristics. We also present an algorithm for calculating optical elements in a sensor scheme, the results of measuring the parametric dependences of magnetic resonance in cells, and the results of direct testing of a sensor in a magnetic shield. We demonstrate sensitivity at the level of 20 fT/√Hz in one sensor channel in the frequency range of 80–200 Hz.
Databáze:	OpenAIRE
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