Affiliation:
1. Beijing Academy of Quantum Information Sciences, Beijing 100193, China.
Abstract
Gated InGaAs/InP avalanche photodiodes are the most practical device for detection of telecom single photons arriving at regular intervals. Here, we report the development of a compact single-photon detector (SPD) module measured just 8.8 × 6 × 2 cm
3
in size and fully integrated with driving signal generation, faint avalanche readout, and discrimination circuits as well as temperature regulation and compensation. The readout circuit employs our previously reported ultra-narrowband interference circuits (UNICs) to eliminate the capacitive response to the gating signal. We characterize a UNIC-SPD module with a 1.25-GHz clock input and find its performance comparable to its counterpart built upon discrete functional blocks. Setting its detection efficiency to 30% for 1,550-nm photons, we obtain an afterpulsing probability of 2.4% and a dark count probability of 8 × 10
−7
per gate under 3-ns hold-off time. We believe that UNIC-SPDs will be useful in important applications such as quantum key distribution.
Publisher
American Association for the Advancement of Science (AAAS)
Cited by
3 articles.
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