OPTICALLY PUMPED MAGNETOMETER AND METHOD OF MEASURING MAGNETIC FORCE
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United States of America Patent
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Issued Date -
Feb 26, 2015
app pub date -
Mar 26, 2013
filing date -
Mar 29, 2012
priority date (Note) -
Abandoned
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Abstract
An optically pumped magnetometer includes: a modulation unit which allows rectangular wave modulation to an angle of a polarization plane of probe light; a detector for detecting a change of the angle of the polarization plane of the probe light transmitted through a cell; and a differential circuit for obtaining a difference in light intensity between components separated by a polarization splitter. Thus, both a reduction of a light intensity noise of the probe light and a separation and reduction of a noise defined by an inverse of a frequency in a low frequency area can be achieved.
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