An Optically Pumped Magnetometer (OPM) is a highly sensitive quantum sensor used to measure extremely weak magnetic fields with exceptional precision. Unlike traditional magnetic field sensors, OPMs operate based on the principles of atomic physics, where laser light is used to manipulate and detect the spin states of atoms, typically alkali metals such as rubidium or cesium.
The working principle of an Optically Pumped Magnetometer (OPM) relies on the interaction between polarized light and atomic vapor. When atoms are exposed to laser light, they become “pumped” into specific energy states. External magnetic fields cause slight changes in these states, which are then detected by measuring variations in the transmitted or absorbed light.
