Polarization dependence of trap detectors

Goebel, R; Yılmaz, Ş.; Pello, R

doi:10.1088/0026-1394/33/3/3

Cited by 21 publications

(15 citation statements)

References 8 publications

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“…A final consideration, to keep measurement uncertainties low, is that, when a trap detector is used to measure the radiant power of a light source (be it a tuneable laser or a quasimonochromatic beam from a monochromator system), the measurement signal has to be corrected for the experimental conditions (e.g. level of radiant power, detector temperature [5,13], spot size or polarization state [14,15]) during the actual calibration of the filter radiometer. This is because the experimental conditions when calibrating the filter radiometer usually differ greatly from those during the calibration of the trap detector.…”

Section: Planck's Law Of Thermal Radiationmentioning

confidence: 99%

Thermodynamic temperature by primary radiometry

Anhalt

Machin

2016

Phil. Trans. R. Soc. A.

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Above the freezing temperature of silver (1234.93 K), the International Temperature Scale of 1990 (ITS-90) gives a temperature, T90, in terms of a defining fixed-point blackbody and Planck's law of thermal radiation in ratio form. Alternatively, by using Planck's law directly, thermodynamic temperature can be determined by applying radiation detectors calibrated in absolute terms for their spectral responsivity. With the advent of high-quality semiconductor photodiodes and the development of high-accuracy cryogenic radiometers during the last two decades radiometric detector standards with very small uncertainties in the range of 0.01-0.02% have been developed for direct, absolute radiation thermometry with uncertainties comparable to those for the realization of the ITS-90. This article gives an overview of a number of design variants of different types of radiometer used for primary radiometry and describes their calibration. Furthermore, details and requirements regarding the experimental procedure for obtaining low uncertainty thermodynamic temperatures with these radiometers are presented, noting that such radiometers can also be used at temperatures well below the silver point. Finally, typical results obtained by these methods are reviewed.

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Section: Planck's Law Of Thermal Radiationmentioning

confidence: 99%

Thermodynamic temperature by primary radiometry

Anhalt

Machin

2016

Phil. Trans. R. Soc. A.

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“…Such configuration of self-calibrating photodiodes distribution became classical one and got the name of trap-detector. Its characteristics were widely investigated [10,11,12,13]. It is obvious that the inherent shortcoming of such systems is small angular width of the receiving polar pattern, which is caused by the relatively small size of photodiode and large path of radiation beam in them.…”

Section: Introductionmentioning

confidence: 99%

Double-diode configuration of self-calibrating photodiodes

Guryev¹,

Kupko²,

Nazarenko³

2003

SPIE Proceedings

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The new method of measurement of monochromatic flows of radiation by means of two-diode configuration of self-calibrating photodiodes, which is based on the measurement of photodiode reflectance, is proposed. The proposed method has the advantage over the traditional design of trap-detector, which is related with the possibility of measurement of non-coherent radiation of the wide directional diagram. This method is also proposed in the traditional design of trap-detector for determination and registration of the portion of the measured radiation flow that is reflected from the receiver, for this the corresponding methods of measurement are proposed. The design allows using both the traditional three-diode configuration, and the described two-diode configuration.The results of the research of corrections for the proposed methods of measurement related with the change of s and p components of the radiation flow at the reflection from the photodiodes are given, for this the measurements of spectral reflectance for s and p components of the radiation flow in the wavelength range of 500 to 800nm were conducted. Besides, the influence of radiation polarization on the measurements uncertainty was analyzed. The experiment results of comparison of the proposed design and the traditional one of the trap-detector with the account for the portion of reflected radiation are given. The difference was not more than 0.071% at conducting measurements in the wavelength range of 500 to 800nm.

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“…The reflectance-type (three-element) trap detectors have polarization-dependent fractional response variations of about 1 × 10 −4 [ 11 ]. The reflectance loss of the S-1337 reflectance-type trap detectors increases from 0.21 % at 920 nm to 1 % at 406 nm [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

“…Because they were free of back reflectance, separately calibrated filters or other optical components could be attached to their inputs without introducing additional uncertainties. The six-element version had a polarization independent responsivity [ 11 , 14 ], lower reflectance loss, and improved spatial response uniformity. Because of these advantages, the six-element transmission-type trap-radiometer is the best choice to transfer responsivity with the lowest possible uncertainty.…”

Section: Introductionmentioning

confidence: 99%

Opto-mechanical and electronic design of a tunnel-trap Si radiometer

Eppeldauer¹,

Lynch²

2000

J. Res. Natl. Inst. Stand. Technol.

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A transmission-type light-trap silicon radiometer has been developed to hold the NIST spectral power and irradiance responsivity scales between 406 nm and 920 nm. The device is built from replaceable input apertures and tightly packed different-size silicon photodiodes. The photodiodes are positioned in a triangular shape tunnel such that beam clipping is entirely eliminated within an 8 field-of-view (FOV). A light trap is attached to the output of the radiometer to collect the transmitted radiation and to minimize the effect of ambient light. The photodiodes, selected for equal shunt resistance, are connected in parallel. The capacitance and the resultant shunt resistance of the device were measured and frequency compensations were applied in the feedback network of the photocurrent-to-voltage converter to optimize signal-, voltage-, and loop-gain characteristics. The trap radiometer can measure either dc or ac optical radiation with high sensitivity. The noise-equivalent-power of the optimized device is 47 fW in dc mode and 5.2 fW at 10 Hz chopping. The relative deviation from the cosine responsivity in irradiance mode was measured to be equal to or less than 0.02 % within 5° FOV and 0.05 % at 8° FOV. The trap-radiometer can transfer irradiance responsivities with uncertainties comparable to those of primary standard radiometers. Illuminance and irradiance meters, holding the SI units (candela, color- and radiance-temperature), will be calibrated directly against the transfer standard trap-radiometer to obtain improved accuracy in the base-units.

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Polarization dependence of trap detectors

Cited by 21 publications

References 8 publications

Thermodynamic temperature by primary radiometry

Thermodynamic temperature by primary radiometry

Double-diode configuration of self-calibrating photodiodes

Opto-mechanical and electronic design of a tunnel-trap Si radiometer

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