Patent · US Active

Characterization of single-photon detectors using a source of photon pairs

US8285515B2 · kind B2 · utility

3Cited by

0References

2Claims

0Family size

Assignee

AT&T Intellectual Property I, L.P. · US

Inventors

Michael Brodsky · Brookline, US
Cristian Antonelli · Popoli, IT
Jungmi Oh · Daejeon, KR

Key dates

Filing date	Jul 13, 2010
Grant date	Oct 9, 2012
Priority date	—
Expiry date	Apr 4, 2031

Classification

Technology area (CPC G)Physics
CPC primaryG01J1/42
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Operational parameters of a single-photon detector are determined with a source of photon pairs. At a fixed trigger, a dark count probability and a series of count probabilities at different optical powers are determined. A particular optical power is selected by adjusting the optical power of the source of photon pairs. The dark count probability and the count probabilities are determined for different trigger rates. The operational parameters include efficiency, afterpulsing constant, and detrap time. The operational parameters are computed by fitting the computed dark count probabilities and count probabilities to a user-defined relationship.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.