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

Coutin, J.-M.; Rougie, B.

doi:10.1051/rfm/2016002

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…The French reference for radiometry at the Laboratoire Commun de Métrologie LNE-Cnam (LCM LNE-Cnam) is a cryogenic radiometer which allows accurate comparison of absorbed optical power with dissipated electrical power associated with a relative accuracy of 0.005% [1]. The calibration of customer's power-meters, such as non-thermal sensors based on photo-electron interaction (photodiodes) or thermal sensors based on thermal energy absorption (thermopiles), is provided with a relative uncertainty of 2% (see Figure 1).…”

Section: Lntroductionmentioning

confidence: 99%

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New optical power sensors using pyrolytic graphite

Silvestri

Pinot

2019

19th International Congress of Metrology (CIM2019)

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A new method for measurements of laser power, using pyrolytic carbon (PyC) levitation as torsional magnetic spring, to detect the moment of force provided by radiation pressure of laser beam is currently developed at the LCM LNE-Cnam. This new power-meter could measure laser power in the range from 300 mW to 100 W with an objective to reach a relative uncertainty of about 1%. Relative to a first experimental setup, the new configuration presented in this paper has been improved taking the main disturbing sources into account. The traceability to SI units of the measurement provided by this new power-meter is presented and discussed.

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Section: Lntroductionmentioning

confidence: 99%

“…A previous article [2] describes the first experimental setup. The power measurement is determined from the approximate expression (1). It allows to calculate the laser power P as a function of the maximum angular deflection max based on a force balance approach.…”

Section: Experimental Setup: Sources Of Error and Uncertaintiesmentioning

confidence: 99%

New optical power sensors using pyrolytic graphite

Silvestri

Pinot

2019

19th International Congress of Metrology (CIM2019)

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“…original to our traceability chain. In particular, using a filter radiometer rather than a radiation thermometer allows us to link our traceability chain to the cryogenic radiometer [4] and to reduce our uncertainties.…”

Section: Introductionmentioning

confidence: 99%

New traceability chain for spectral irradiance measurement at LNE-Cnam

Valin¹,

Obein²,

Rougié³

et al. 2022

Meas. Sci. Technol.

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LNE-Cnam has changed its traceability chain for measuring the spectral irradiance of a light source. This facility allows calibration of spectral irradiance of a standard lamp based on a comparison with a High Temperature BlackBody (HTBB). The reference spectral irradiance is determined by measuring the temperature of the HTBB with a filter radiometer calibrated against our radiant flux reference. This traceability scheme differs from the one used in our former setup, which was mainly based on the International Temperature Scale, ITS-90. Both principles are used in National Measurement Institutes. Our facility uses well known methods [1] adapted to our best capabilities as well as a particular development in optical arrangement and filter radiometer calibration. Thanks to this new measurement setup, our spectral irradiance reference is now traceable to radiometric reference, that is our cryogenic radiometer [2]. We have extended our measurement capability to cover the spectral range from 250 nm to 2500 nm. We have simplified the process by reducing the number of benches (3 in 1) and the number of operations, and we have designed a compact measuring setup through the use of a rotating integrative sphere. This allows us to reduce by at least a factor two our measurement uncertainties over almost the entire spectral range. With this new measurement facility, France participates in the ongoing CCPR k1.a key comparison. This is a key comparison of the Consultative Committee of Photometry and Radiometry for Spectral irradiance from 250 nm to 2500 nm of tungsten halogen lamps. This communication shows the method used, and its validation.

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

Cited by 2 publications

References 4 publications

New optical power sensors using pyrolytic graphite

New optical power sensors using pyrolytic graphite

New traceability chain for spectral irradiance measurement at LNE-Cnam

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