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 journalArticle

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 1


All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Park, C. W., Park, J. B., Park, Y. S., Lee, S. H., Shin, H. J., Bae, B. S., Moon, S., & Han, S. K. (2006). Single-photon counting in the 1550-nm wavelength region for quantum cryptography. Journal of the Korean Physical Society, 49(1), 111-114.