Laser power and energy sensor utilizing anisotropic thermoelectric material
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United States of America Patent
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Jun 2, 2020
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N/A
app pub date -
May 5, 2016
filing date -
Oct 2, 2012
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Abstract
A laser-radiation sensor includes a copper substrate on which is grown an oriented polycrystalline buffer layer surmounted by an oriented polycrystalline sensor-element of an anisotropic transverse thermoelectric material. An absorber layer, thermally connected to the sensor-element, is heated by laser-radiation to be measured and communicates the heat to the sensor-element, causing a thermal gradient across the sensor-element. Spaced-apart electrodes in electrical contact with the sensor-element sense a voltage corresponding to the thermal gradient as a measure of the incident laser-radiation power.
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