Patent · US Active

Characterization of single-photon detectors using a continuous wave laser source

US9068881B2 · kind B2 · utility

2Cited by

0References

17Claims

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	Jun 30, 2015
Priority date	—
Expiry date	Jun 12, 2032

Classification

Technology area (CPC G)Physics
CPC primaryG01J2001/4466
WIPO fieldMeasurement
WIPO sectorInstruments

Abstract

Operational parameters of a single-photon detector are determined with a continuous wave laser source. 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 using a wide-range variable attenuator to attenuate the optical power of the continuous wave laser. 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.