Setting Single Photon Detectors for Use with an Entangled Photon Distribution System

Report No. ARL-TR-8229
Authors: Daniel E Jones, Drew Weninger, Michael Brodsky
Date/Pages: December 2017; 26 pages
Abstract: It is often a difficult task to find the optimal operating conditions of a single photon detector (SPD). The proper use and measurement of the entangled photon pairs generated by an entangled photon pair source require at least 2 SPDs operating at their highest possible detection efficiency and lowest possible dark count rate and with the lowest amount of counts due to afterpulsing. However, tuning of the detector bias and threshold values results in a tradeoff in detector performance where increasing the detector efficiency also increases afterpulsing and the dark count rate. In this report we discuss the work of a student intern from the US Naval Academy and how he learned to optimize the detector settings to detect and evaluate the entangled photon pairs generated by an entangled photon pair source.
Distribution: Approved for public release
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Last Update / Reviewed: December 1, 2017