Compact two-element transmission trap detector for 1550 nm wavelength

Aigar Vaigu, Toomas Kübarsepp, Farshid Manoocheri, Mikko Merimaa, Erkki Ikonen

    Research output: Contribution to journalArticleScientificpeer-review

    4 Citations (Scopus)


    We have developed and characterized a new kind of trap detector based on InGaAs photodiodes. The detector contains only two 10 mm diameter InGaAs photodiodes arranged in a transmission trap configuration with non-coaxial beam orientation. The detector has large active area, more than 9 mm in diameter, and a built-in linearity monitoring feature. One of the key advantages of the developed detector is polarization insensitivity - the difference in responsivity between two orthogonal incident polarization states is zero within the standard uncertainty of 0.3%. The spatial non-uniformity of the responsivity is less than 0.5% across the active area.

    Original languageEnglish
    Pages (from-to)1-6
    Number of pages6
    JournalMeasurement Science and Technology
    Issue number5
    Publication statusPublished - 1 May 2015
    MoE publication typeA1 Journal article-refereed


    • Infrared
    • InGaAs
    • Metrology
    • Photodetectors
    • Polarization insensitive detector
    • Transmission trap detector
    • Trap detector


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