Measurement of the absorptance of a cryogenic radiometer cavity in the visible and near infrared

López, Marco; Hofer, Helmut; Kück, S.

doi:10.1088/0026-1394/42/5/010

Cited by 10 publications

(2 citation statements)

References 6 publications

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“…The absorptance measurement of the radiometer cavity is reported in detail in [8]. It was carried out with an integrating sphere 10.16 cm in diameter that uses Spectraflect (barium sulfate) as reflectance coating.…”

Section: Absorptance Measurement Of the Cavitymentioning

confidence: 99%

High accuracy measurement of the absolute spectral responsivity of Ge and InGaAs trap detectors by direct calibration against an electrically calibrated cryogenic radiometer in the near-infrared

2006

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This paper presents measurements of the absolute spectral responsivity of Ge and InGaAs trap detectors carried out by direct comparison with an electrically calibrated cryogenic radiometer (ECCR) in the near-infrared spectral range. Two tunable laser diodes were used as radiation sources operating between 1260 nm and 1360 nm and between 1460 nm and 1620 nm. The measurements of the cavity absorption and the Brewster-angled window transmission of the ECCR in these wavelength ranges are presented. A detailed analysis of the total measurement uncertainty is performed. The relative standard uncertainty of the responsivity measurement achieved is less than 5 × 10−4 for all wavelengths investigated. The measurements are also discussed in terms of external spectral quantum efficiency, which is up to 90% for the Ge trap and up to 93% for the InGaAs trap. The determined spectral responsivities are compared with the existing scale for spectral responsivity at the Physikalisch-Technische Bundesanstalt (the German National Metrology Institute) based on a thermopile detector. The deviation between the scales is at most ± 0.15% for the InGaAs trap detector and at most ± 0.30% for the Ge trap detector. The agreement is therefore within the combined standard uncertainties.

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Section: Absorptance Measurement Of the Cavitymentioning

confidence: 99%

High accuracy measurement of the absolute spectral responsivity of Ge and InGaAs trap detectors by direct calibration against an electrically calibrated cryogenic radiometer in the near-infrared

2006

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“…La mesure du facteur d'absorption de la cavité peut se faire sur une cavité factice, ce facteur n'évoluant pas dans le temps. Cette étude a été faite dans ces conditions à la PTB [6], en s'inspirant de la méthode développée au LCM (anciennement INM) pour le radiomètre cryogénique LaseRad [7], mais qui avait été faite en démontant la cavité du radiomètre.…”

Section: Mesure Du Facteur D'absorption De La Cavité Absorbante Du Raunclassified

Caractérisation et validation d’un nouveau radiomètre cryogénique au LNE-LCM

Coutin¹,

Rougie²

2016

R. franç. métrol.

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Le laboratoire national de métrologie LNE-LCM utilise un radiomètre cryogénique comme référence primaire pour réaliser ses échelles radiométriques et photométriques. Cet instrument est un radiomètre à substitution électrique qui fonctionne à très basse température (4,2 K). Il permet d'effectuer des mesures absolues de la puissance de faisceaux lasers avec une incertitude type de l'ordre de 5 × 10 −5. Un nouveau radiomètre cryogénique a été installé au laboratoire, et le présent article décrit sa caractérisation métrologique complète qui permet d'atteindre ce niveau d'incertitude.

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Effective Emissivity

Sapritsky

Prokhorov²

2020

Blackbody Radiometry

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Measurement of the absorptance of a cryogenic radiometer cavity in the visible and near infrared

Cited by 10 publications

References 6 publications

High accuracy measurement of the absolute spectral responsivity of Ge and InGaAs trap detectors by direct calibration against an electrically calibrated cryogenic radiometer in the near-infrared

High accuracy measurement of the absolute spectral responsivity of Ge and InGaAs trap detectors by direct calibration against an electrically calibrated cryogenic radiometer in the near-infrared

Caractérisation et validation d’un nouveau radiomètre cryogénique au LNE-LCM

Effective Emissivity

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