Absolute efficiency and time-response measurement of single-photon detectors

P. G. Kwiat, A. M. Steinberg, R. Y. Chiao, P. H. Eberhard, P. H. Eberhard, M. D. Petroff, P. G. Kwiat

Research output: Contribution to journalArticlepeer-review


Using correlated photons from spontaneous parametric downconversion, we have measured both the absolute quantum efficiencies and the time responses of four single-photon detectors. Efficiencies as high as (76.4 ± 2.3)% (at 702 nm) were seen, which to our knowledge are the highest reported single-photon detection efficiencies. An auxiliary retroreflection mirror was found to increase the net detection efficiency by as much as a factor of 1.19. The narrowest time profile for coincidences between two detectors displays a peak with 300 ps FWHM. We also investigated the presence of afterpulses and the effects of saturation and varying device parameters.

Original languageEnglish (US)
Pages (from-to)1844-1853
Number of pages10
JournalApplied Optics
Issue number10
StatePublished - Apr 1994
Externally publishedYes


  • Avalanche photodiode
  • Photon counting
  • Quantum efficiency

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Engineering (miscellaneous)
  • Electrical and Electronic Engineering


Dive into the research topics of 'Absolute efficiency and time-response measurement of single-photon detectors'. Together they form a unique fingerprint.

Cite this