Measurements of the photon detection efficiency done for Geiger-mode avalanche photodiodes (G-APD)

Physics – Medical Physics

Scientific paper

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G-Apd, Sipm, Pde, Cross-Talk, After-Pulsing

Scientific paper

Estimation of the Photon Detect Efficiency (PDE) of multi-pixel Geiger-mode avalanche photodiodes (G-APD) based on measurements of the G-APD response to low-intensity light is presented. The fit of the light-response spectra takes into account after-pulsing and cross-talk effects and yields the value of initial photons. Using a calibrated photo-detector as a reference, the value of the PDE can be calculated. The sources of systematic error of the obtained PDE is discussed as well as possibility for its minimization.

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