Recently atomic magnetometers are one of the best tools in biomagnetic measurement such as magnetic field of brain and heart. In this paper, the technology of optically pumped atomic magnetometer based on circularly polarized light absorption pumping is described. We have been investigated a new method for measuring polarization effect in an alkali vapor based on polarized light transmission. I...

Alignment-based optically pumped magnetometers (OPMs) are capable of measuring oscillating magnetic fields with high sensitivity in the $\mathrm{fT}/\sqrt{\mathrm{Hz}}$ range. Until now, alignment-based have only used paraffin-coated vapour cells to extend spin relaxation lifetimes alkali vapour. The drawback these is that they hand blown and therefore time intensive, somewhat unreliable, produ...

Optically pumped magnetometers (OPMs) based on lasers and alkali-metal vapor cells are currently the most sensitive non-cryogenic magnetic field sensors. Many applications in neuroscience and other fields require high-resolution, high-sensitivity magnetic microscopic measurements. In order to meet this demand we combined a cm-size spin-exchange relaxation-free (SERF) OPM and flux guides (FGs) t...

We present a portable optically pumped magnetometer instrument for ultra-sensitive measurements within the Earth's magnetic field. The central part of system is sensor head operating MEMS-based Cs vapor cell in light-shift dispersed Mz mode. It connected to compact, battery-driven electronics module by flexible cable. briefly review working principles device and detail on realization both, elec...

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We propose a dual-mode optically pumped magnetometer (OPM) that can flexibly switch between single-beam modulation mode and double-beam DC mode. Based on 4 mm×4 mm miniaturized vapor cell, the achieves sensitivity of 7 fT/Hz1/2 with probe noise below working bandwidth over 65 Hz. This is designed to precisely measure floor mu-metal magnetic shield. The (sensitivity 20 fT/Hz1/2) exhibits charact...