Patent · US Active

Laser power and energy sensor utilizing anisotropic thermoelectric material

US9012848B2 · kind B2 · utility

0Cited by

12References

16Claims

0Family size

Assignee

Coherent, Inc. · US

Inventors

Robert Semerad · St. Wolfgang, DE
Erik Krous · Wilsonville, US
James Schloss · Tigard, US

Key dates

Filing date	Jul 17, 2013
Grant date	Apr 21, 2015
Priority date	—
Expiry date	Jul 17, 2033

Classification

Technology area (CPC G)Physics
CPC primaryG01K17/003
WIPO fieldMeasurement
WIPO sectorInstruments

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.