High-accuracy room temperature planar absolute radiometer based on vertically aligned carbon nanotubes

Published

July 1, 2021

Author(s)

Anna Vaskuri, Michelle Stephens, Nathan Tomlin, Matthew Spidell, Chris Yung, Andrew Walowitz, Cameron Straatsma, David Harber, John H. Lehman

Abstract

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 laser power detector standard at the National Institute of Standards and Technology (NIST). This instrument will lower the combined relative expanded measurement uncertainty (k = 2) from 0.84% to 0.13%. PARRoT's performance was validated by comparing its response against a transfer standard silicon trap detector traceable to NIST's primary standard laser optimized cryogenic radiometer (LOCR) and against the C-series calorimeter. On average these comparisons agreed to better than 0.008% and 0.05%, respectively.

Citation

Optics Express

Volume

29

Issue

14

Pub Type

Journals

Download Paper

https://doi.org/10.1364/OE.427597

Local Download

Keywords

Absolute radiometer, bolometer, laser power, primary standard, room temperature, background compensation, vertically aligned carbon nanotubes

Citation

Vaskuri, A. , Stephens, M. , Tomlin, N. , Spidell, M. , Yung, C. , Walowitz, A. , Straatsma, C. , Harber, D. and Lehman, J. (2021), High-accuracy room temperature planar absolute radiometer based on vertically aligned carbon nanotubes, Optics Express, [online], https://doi.org/10.1364/OE.427597, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=932047 (Accessed October 18, 2025)