Sensor device and for determining a physical value
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United States of America Patent
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Feb 21, 2012
Grant Date -
Jun 4, 2009
app pub date -
Jul 6, 2005
filing date -
Jul 30, 2004
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Abstract
A sensor device for determining a physical value using a laser, whose emission behavior can be affected by the physical value is described. The laser is arranged to emit at least two concurrent modes lying above a laser threshold and the physical value is determined using a comparison of changes of the at least two modes occurring under the influence of the physical value.
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