ATOMIC MAGNETOMETER AND OPERATING METHOD FOR THE SAME

摘要

PROBLEM TO BE SOLVED: To provide an atomic magnetometer and an operating method for the same.SOLUTION: The atomic magnetometer includes; a vapor cell 110 that receives a circularly polarized pump beam 31 and a linearly polarized probe beam 33 and contains an alkali metal vapor; a detector 130 adapted to receive the probe beam passing through the vapor cell to measure magneto-optical rotation of the probe beam; a feedback coil 122 that generates a negative feedback magnetic field signal orthogonal to a first plane defined by traveling directions of the probe beam and the pump beam and feeds the same to the vapor cell; and a feedback amplifier 124 adapted to receive an output signal of the detector and provide the feedback coil with feedback current to generate a negative feedback magnetic field proportional to a measurement magnetic field. The measurement magnetic field of a measurement target provides magneto-optical rotation of the probe beam in the vapor cell.SELECTED DRAWING: Figure 1