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New method for spectral irradiance and radiance responsivity calibrations using kHz pulsed tunable optical parametric oscillators

Published

Author(s)

Yuqin Zong, Steven W. Brown, George P. Eppeldauer, Keith R. Lykke, Yoshihiro Ohno

Abstract

Continuous-wave (CW) tunable lasers have been used for detector calibrations, especially for spectral irradiance and radiance responsivity, for many years at the National Institute of Standards and Technology (NIST) and other national metrology institutes. These CW tunable lasers, however, are expensive and difficult to automate. To address this issue, we developed a new method for spectral irradiance and radiance responsivity calibrations using relatively low cost, fully automated kHz pulsed tunable optical parametric oscillators (OPOs). The new method is based on measurements of the total energy of a pulsed OPO train using two synchronized current integrators (also called charge amplifiers) to measure the total integrated electric charges from a test detector and a standard detector, respectively. The absolute expanded uncertainty of this method is estimated to be 0.05 % (with a coverage factor of k = 2) for spectral irradiance responsivity calibrations, and the dominant uncertainty contribution is from the reference trap detector.
Citation
Metrologia
Volume
49

Keywords

calibration, detector, laser, optical parametric oscillator, tunable

Citation

Zong, Y. , Brown, S. , Eppeldauer, G. , Lykke, K. and Ohno, Y. (2012), New method for spectral irradiance and radiance responsivity calibrations using kHz pulsed tunable optical parametric oscillators, Metrologia, [online], https://doi.org/10.1088/0026-1394/49/2/S124 (Accessed April 13, 2024)
Created March 2, 2012, Updated November 10, 2018