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Aly Artusio-Glimpse, Kyle Rogers, Paul A. Williams, John H. Lehman
We present the first measurements of kilowatt laser power with an uncertainty less than 1 %. These represent progress toward the most accurate measurements of
Anna Vaskuri, Michelle Stephens, Nathan A. Tomlin, Matthew Spidell, Christopher Yung, Andrew Walowitz, Cameron Straatsma, David Harber, John H. Lehman
We have developed a Planar Absolute Radiometer for Room Temperature (PARRoT) that will replace the legacy C-series calorimeter as the free-space continuous-wave
Matthew Spidell, Davis conklin, Christopher Yung, EVANGELOS THEOCHAROUS, John H. Lehman
We have improved the manufacturability of spectrally flat pyroelectric detectors for visible to mid-infrared wavelengths by demonstrating a spray-on, binder
Michelle Stephens, Christopher Yung, Nathan Tomlin, Anna Vaskuri, Ivan Ryger, Matthew Spidell, Malcolm G. White, Thomas Jenkins, Jennifer Landry, Tesfatsion Sereke, John Lehman
The design and performance of a room temperature electrical substitution radiometer for use as an absolute standard for measuring continuous-wave laser power
Kyle A. Rogers, Paul A. Williams, Gordon A. Shaw, John H. Lehman
High power laser applications in areas such as laser processing of materials can require an accurately measured laser power. Radiation pressure-based laser
John H. Lehman
,
Matthew Spidell
,
Joshua Hadler
and
Paul A. Williams
Patent Description NIST has invented a device that permits full and accurate characterization of a laser beam without attenuating the laser beam or perturbing its direction. The unique three-mirror design allows the absolute power to be measured via radiation pressure (from the force on one mirror)
NIST scientists have devised a radically new method of determining laser power by measuring the radiation pressure exerted by a laser beam on a reflective surface.
This invention is an electrical-substitution radiometer (ESR) — a thermal detector for optical and infrared radiation — based on a novel configuration of arrays of vertically aligned carbon nanotubes.