Published July 8, 2003 | Version v1
Miscellaneous Open

Reference detectors for low flux optical radiation measurements

Creators

Description

The parametric down conversion of photons generated in a non-linear crystal gives rise to two correlated photons. Associated to a System of counting of coincidences, this phenomenon makes possible the quantum efficiency measurements of detectors working on photon counting levels, without using neither sources nor detectors of references. This new method was developed at BNMINM with the aim to realize new standards detectors in the field of weak flows. It allows the determination of quantum efficiency with a relative uncertainty of 1,1%. A comparison with the IENGF (Italy) bearing on the quantum determination of efficiency of one of BNM-FNM detectors made possible to confront the exactitude of the measuring equipment. This detector was also made the object of a comparison with the French reference of radiometry, the cryogenic radiometer, the results were in agreement with uncertainties of measurements. (author)

Abstract (French)

La conversion parametrique de photons engendree dans un cristal non lineaire donne naissance a deux photons correles. Associe a un systeme de comptage de coincidences, ce phenomene permet de faire des mesures d'efficacite quantique de detecteurs fonctionnant en regime de comptage de photons, sans utiliser ni sources ni detecteurs de references. Cette nouvelle methode a ete mise en place au BNM-INM avec comme objectif la realisation de nouveaux detecteurs de references dans le domaine des faibles flux. Elle permet la determination de l'efficacite quantique avec une incertitude relative de 1,1%. Une comparaison avec l'IENGF (Italie) portant sur la determination de l'efficacite quantique de l'un des detecteurs du BNM-INM a permis de confronter l'exactitude des chaines de mesure. Ce detecteur a aussi fait l'objet d'une comparaison avec la reference francaise de radiometrie, le radiometre cryogenique, les resultats etaient la aussi en accord aux incertitudes de mesures pres. (auteur)

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Additional details

Additional titles

Original title (French)
Detecteur de reference pour les mesures de rayonnements optiques a faible flux

Identifiers

URL
http://www.iaea.org/inis/Contacts/;

Publishing Information

Imprint Pagination
177 p.
Report number
FRNC-TH--9271

INIS

Country of Publication
France
Country of Input or Organization
France
INIS RN
47013646
Subject category
S46: INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY;
Resource subtype / Literary indicator
Thesis
Descriptors DEI
COINCIDENCE METHODS; CRYSTALS; DATA ACQUISITION SYSTEMS; DATA COVARIANCES; INTERLABORATORY COMPARISONS; LASERS; LIGHT SOURCES; NONLINEAR OPTICS; PHOTODIODES; PHOTOMULTIPLIERS; PHOTONS; QUANTUM EFFICIENCY; RADIOMETERS; SEMICONDUCTOR DETECTORS
Descriptors DEC
BOSONS; COUNTING TECHNIQUES; EFFICIENCY; ELEMENTARY PARTICLES; MASSLESS PARTICLES; MEASURING INSTRUMENTS; OPTICS; PHOTOTUBES; RADIATION DETECTORS; RADIATION SOURCES; SEMICONDUCTOR DEVICES; SEMICONDUCTOR DIODES

Optional Information

Notes
56 refs.; Available from the INIS Liaison Officer for France, see the 'INIS contacts' section of the INIS website for current contact and E-mail addresses: http://www.iaea.org/inis/Contacts/