Long-term spectral responsivity stability of predictable quantum efficient detectors

G. Porrovecchio (Corresponding Author), U. Linke, M. Smid, J. Gran, E. Ikonen, L. Werner

    Research output: Contribution to journalArticleScientificpeer-review

    2 Citations (Scopus)


    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.

    Original languageEnglish
    Article number065008
    Issue number6
    Publication statusPublished - 1 Dec 2022
    MoE publication typeA1 Journal article-refereed


    • photometry
    • predictable quantum efficient detector
    • radiometry


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