| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic sensor that enables the measurement of a micro-magnetic field with high accuracy and achieves a simplified structure.SOLUTION: The magnetic sensor includes: a first gas in which a valence electron is composed of an odd number of atoms or ions; a probe light source 11 which causes first circular polarized light to be incident on the first gas; a second gas arranged on an optical path of a second circular polarized light transmitted through the first gas; an AC magnetic field generator 22 which generates an AC magnetic field Brf in a direction intersecting with an optical axis of the first circular polarized light and the second circular polarized light for the first gas and the second gas and generates magnetic resonance; a bias magnetic field generator 21 which generates bias magnetic fields Bb1, Bb2 in a direction parallel to the optical axis of the first circular polarized light and the second circular polarized light with different intensities for the first gas and the second gas and differentiates the optical transmittance of the first circular polarized light in the first gas from the optical transmittance of the second circular polarized light in the second gas; and a detector 14 which detects a light amount of the first circular polarized light and a third circular polarized light that is the second circular polarized light transmitted through the second gas. |
