13 May 2015 Single photon counting for space based quantum experiments
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We present a software based control system for Geiger-mode avalanche photodiodes (GM-APDs) that enables constant photon detection efficiency irrespective of the diode's junction temperature. Furthermore, we demonstrate that this control system enables passively quenched GM-APDs to double the rate of photon detection events before saturation compared to the standard control method that fixes the junction temperature and applied bias voltage. We present data demonstrating the robustness of the GM-APD control system when tested in near-space conditions using a correlated photon pair source carried by a weather balloon to an altitude of 35.5 km.
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R. Chandrasekara, R. Chandrasekara, Z.K. Tang, Z.K. Tang, Y.C. Tan, Y.C. Tan, C. Cheng, C. Cheng, C. Wildfeuer, C. Wildfeuer, A. Ling, A. Ling, "Single photon counting for space based quantum experiments", Proc. SPIE 9492, Advanced Photon Counting Techniques IX, 949209 (13 May 2015); doi: 10.1117/12.2176812; https://doi.org/10.1117/12.2176812

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