Abstract
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 language | English (US) |
|---|---|
| Pages (from-to) | 1844-1853 |
| Number of pages | 10 |
| Journal | Applied Optics |
| Volume | 33 |
| Issue number | 10 |
| DOIs | |
| State | Published - Apr 1994 |
| Externally published | Yes |
Keywords
- Avalanche photodiode
- Photon counting
- Quantum efficiency
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Engineering (miscellaneous)
- Electrical and Electronic Engineering
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