Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group

Absolute cryogenic radiometer for high accuracy optical radiant power measurement in a wide spectral range

Not Accessible

Your library or personal account may give you access

Abstract

An absolute cryogenic radiometer (ACR) with a detachable optical window was designed and built for high accuracy optical radiant power measurement and photodetector spectral responsivity calibration. The ACR receiver is an electroplated pure copper cavity with a 50-μm-thick wall and inner surface coated with a specular black polymer material mixed with highly dispersible carbon nanotubes. The absorptivity of the cavity receivers was evaluated to be ≥0.9999 in the 250 nm–16 μm wavelength range and ≥0.99995 in 500 nm–16 μm. The cavity receiver works at the temperature of ∼5.2 K with nanowatt-level noise-equivalent power. The relative standard uncertainty is 0.041% for the measurement of ∼100 μW optical radiant power (250 nm–16 μm) and 0.015% for ∼1 mW (500 nm–16 μm).

© 2019 Chinese Laser Press

PDF Article
More Like This
Characterization of an absolute cryogenic radiometer as a standard detector for radiant-power measurements

R. U. Datla, K. Stock, A. C. Parr, C. C. Hoyt, P. J. Miller, and P. V. Foukal
Appl. Opt. 31(34) 7219-7225 (1992)

ACR II: Improved absolute cryogenic radiometer for low background infrared calibrations

Adriaan C. Carter, Steven R. Lorentz, Timothy M. Jung, and Raju U. Datla
Appl. Opt. 44(6) 871-875 (2005)

Cited By

You do not have subscription access to this journal. Cited by links are available to subscribers only. You may subscribe either as an Optica member, or as an authorized user of your institution.

Contact your librarian or system administrator
or
Login to access Optica Member Subscription

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved