A single-photon detector for high-speed telecom-band quantum communication applications

Chuang Liang*, Kim F. Lee, Paul L. Voss, Eric Corndorf, Gregory S. Kanter, Jun Chen, Xiaoying Li, Prem Kumar

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

5 Scopus citations


We present the design and construction of a high-speed telecom-band (1.5 μm) single-photon counting system based on an InGaAs/InP avalanche photodiode (APD) operating in the gated Geiger mode. The detector can be gated at high speeds (we examine its performance up to 25 MHz) to maximize the counting rate in long-distance, telecom-band, fiber-optic quantum communication applications. Narrow gate pulses (250 ps full width at half maximum) are used to reduce the dark-count and the after-pulse probability. In order to count the avalanche events, we employ a high-speed comparator to sample the unfiltered and unamplified avalanche photocurrent. The APD and all the associated electronics are integrated onto a printed circuit board with a computer interface. In addition, we cool the APD to -27C to reduce the dark-count probability.

Original languageEnglish (US)
Article number589314
Pages (from-to)1-6
Number of pages6
JournalProceedings of SPIE - The International Society for Optical Engineering
StatePublished - Dec 1 2005
EventQuantum Communications and Quantum Imaging III - San Diego, CA, United States
Duration: Aug 2 2005Aug 4 2005


  • Avalanche photodiode
  • Single-photon detector

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering


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