Long-term spectral responsivity stability of predictable quantum efficient detectors. (1st December 2022)

• Record Type: Journal Article
• Authors: Porrovecchio, G; Linke, U; Smid, M; Gran, J; Ikonen, E; Werner, L
• Is Part Of: Metrologia. Volume 59:Number 6(2022)
• Publication Date: 2022-12-01
• Subjects: radiometry -- photometry -- predictable quantum efficient detector; Weights and measures -- Periodicals; Weights and Measures -- Periodicals; 530.805
• DOI: 10.1088/1681-7575/ac938c
• Languages: English
• ISSNs: 0026-1394

Abstract

Abstract: The stability of induced junction silicon photodiodes used to construct the predictable quantum efficient detector (PQED) has been studied over a time period of a decade by measurements of its spectral responsivity against absolute cryogenic radiometers (CR) in two independent laboratories at CMI and PTB. PQEDs operated at room temperature show a long-term temporal stability within 150 ppm over a broad spectral range during a 10-year period, well within the range of the claimed measurement uncertainty values of the CRs. This long term stability fulfills one of the fundamental requirements to establish a new primary standard for the measurement of power of optical radiation.