ATOMIC MAGNETOMETER AND OPERATING METHOD OF THE SAME

摘要

The present invention provides an atomic magnetometer and an operating method thereof. The atomic magnetometer comprises: a vapor cell receiving a circularly polarized pump beam and a linearly polarized probe beam and containing alkali metal vapor; a detector receiving the probe beam passing through the vapor cell to measure magneto-optical rotation of the probe beam; a feedback coil which generates a signal of a negative feedback magnetic field orthogonal to a first plane defined by traveling directions of the probe beam and the pump beam, and provides the negative feedback magnetic field signal to the vapor cell; and a feedback amplifier which provides feedback current to the feedback coil to generate the negative feedback magnetic field proportional to a measurement magnetic field by receiving an output signal of the detector. The measurement magnetic field of a measurement target provides the magneto-optical rotation of the probe beam in the vapor cell.