Method and apparatus for implementing EIT magnetometry
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United States of America Patent
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Nov 8, 2011
Grant Date -
Nov 26, 2009
app pub date -
May 21, 2009
filing date -
May 21, 2008
priority date (Note) -
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Abstract
A magnetometer is provided comprising an atomic vapor in an enclosure, a source of light for preparing the vapor into a state exhibiting electromagnetically induced transparency, a first laser beam passing through the atomic vapor, a phase detector for detecting changes in phase of the first laser beam, and a controller which controls the light source and laser beam and receives the information detected by the phase detector in order to compute from those changes in phase a magnetic field strength in the presence of a selected background magnetic field of at least 0.001 T. Operation in the presence of a background field helps make this magnetometer suitable for diagnostic imaging applications.
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