Single-photon counting in the 1550-nm wavelength region for quantum cryptography

Chul Woo Park, Jun Bum Park, Young Soo Park, Seung Hun Lee, Hyun Jun Shin, Byung Seong Bae, Sung Moon, Sang Kook Han

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


In this paper, we report the measured performance of an InGaAs avalanche photodiode (APD) Module fabricated for single-photon counting. We measured the dark current noise, the after-pulse noise, and the quantum efficiency of the single- photon detector for different temperatures. We then examined our single-photon source and detection system by measuring the coincident probability. From our measurement, we observed that the after-pulse effect of the APD at temperatures below 105 °C caused cascade noise build-up on the succeeding electrical signals.

Original languageEnglish
Pages (from-to)111-114
Number of pages4
JournalJournal of the Korean Physical Society
Issue number1
Publication statusPublished - 2006 Jul

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)


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