Apparatus and method for lower magnetometer drift with increased accuracy

摘要

A system or method comprising controlling an optical excitation source and an RF excitation source to apply a first, second, third, fourth pulse sequence comprising: a first, third, fifth, seventh optical excitation pulse, a first, second, third, fourth pair of RF excitation pulses separated by a first, second, third, fourth time period, a second, fourth, sixth, eighth optical excitation pulse to the magneto-optical defect centre material respectively; receiving first, second, third, fourth light detection signals from an optical detector based on optical signals emitted from the magneto-optical defect centre material due to the first, second, third, fourth pulse sequences respectively; providing a first and second magnetometry curve as a function of the RF excitation frequency based on the first and second, and third and fourth light detection signals respectively 1402; providing a combined magnetometry curve based on the inverse tangent of the first and second magnetometry curve1406; wherein the first and second magnetometry curves are in quadrature. A second independent claim wherein the pulse sequence of said system or method is a Ramsey pulse sequence.