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Calibrating Photon-Counting Detectors to High Accuracy: Background and Deadtime Issues



Michael Ware, Alan L. Migdall, Joshua Bienfang, Sergey Polyakov


When photon-counting detectors are calibrated in the presence of a background signal, deadtime effects can be significant and must be carefully accounted for to achieve high accuracy. We present a method for separating the correlated signal from the background signal that appropriately handles deadtime effects. This method includes consideration of pulse timing and afterpulsing issues that arise in typical avalanche photo diode (APD) detectors. We illustrate how these effects should be accounted for in the calibration process. We also discuss detector timing issues that should be considered in detector calibration.
Journal of Modern Optics


avalanche photodiode, calibration, correlated photon, deadtime, metrology, parametric downconversion, photon, photon-counting


Ware, M. , Migdall, A. , Bienfang, J. and Polyakov, S. (2007), Calibrating Photon-Counting Detectors to High Accuracy: Background and Deadtime Issues, Journal of Modern Optics, [online], (Accessed May 20, 2024)


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Created January 19, 2007, Updated October 12, 2021