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Balanced Single Photon Avalanche Detector with Variode‐Based Spike Noise Cancellation

Spike noise cancellation is important for high‐speed single photon avalanche photodiode. In this article, we demonstrated a balanced single photon detector at 1.5 μm that contains one InGaAs/InP single photon avalanche photodiode and one matched variode. Suppression ratio of 27 dB can be achieved. At 253 K, detection efficiency of 13.9% is obtained with 1.06 × 10−5 per gate dark count probability and 4.3% after‐pulse probability at 100 MHz gating frequency. © 2013 Wiley Periodicals, Inc. Microwave Opt Technol Lett 55:2877–2879, 2013