Journal ArticleDOI
Improved Near-Infrared Detectors
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TLDR
In this paper, the properties of a new large area InGaAs photodiode with near unity internal quantum efficiency are described and compared with measurements on germanium photodiodes.Abstract:
The paper describes the properties of a new large area InGaAs photodiode with near unity internal quantum efficiency. Measurements of linearity, spatial uniformity and dark current of the photodiodes are presented and compared with measurements on germanium photodiodes. The paper also describes the performance of a detector constructed from an arrangement of three of these photodiodes and shows how it has a calculable responsivity from 980 nm to 1 640 nm. It also describes how such a detector can be used as a sensor for a fibre-optic power meter with an uncertainty of around 0,1%.read more
Citations
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Journal ArticleDOI
Radiometry with cryogenic radiometers and semiconductor photodiodes
TL;DR: In this paper, the authors reviewed some of the advances in optical radiation measurements made over the last twenty years, particularly through the use of cryogenic radiometers and solid-state detector transfer standards.
Journal ArticleDOI
Spectral characterization of Ge trap detectors and photodiodes used as transfer standards
K D Stock,R Heine,H Hofer +2 more
TL;DR: In this article, the spectral responsivity of a reflection trap detector with three photodiodes was compared with that of a single InGaAs photodiode, and the temperature effect on the spectral response was measured within the temperature range 10 °C to 30 °C.
Journal ArticleDOI
Primary radiometric quantities and units
TL;DR: In this article, the authors reviewed methods used for the establishment and dissemination of primary radiometric quantities together with the performance and use of filter radiometers, which are dominating advances in optical radiation measurement.
Journal ArticleDOI
Characterisation of optical detectors using high-accuracy instruments
TL;DR: In this article, the authors described the facilities of the Metrology Research Institute at the Helsinki University of Technology, and methods for characterisation of optical detectors for spectral radiant intensity and irradiance responsivity, including a reference spectrometer with a number of auxiliary set-ups.
Journal ArticleDOI
Anomalous non-linear behaviour of InGaAs photodiodes with overfilled illumination
TL;DR: In this article, a device composed of commercial optical fiber components and based on a flux-addition method has been designed for the measurement of the linearity of near-infrared detectors over six decades with uncertainties of less than ± 0.04%.
References
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Journal ArticleDOI
A Cryogenic Radiometer for Absolute Radiometric Measurements
J E Martin,Nigel Fox,P J Key +2 more
TL;DR: In this article, a new electrical-substitution absolute radiometer operating at 5 K, based on a standard commercial helium cryostat, which has been developed at NPL for optical radiant power measurements, is described.
Journal ArticleDOI
Trap Detectors and their Properties
TL;DR: In this article, the authors describe a new solid state detector which fulfils all the requirements of the ideal detector for optical radiation measurements, which is spatially uniform, linear, stable and has a predictable relative spectral response.
Journal ArticleDOI
Silicon detector nonlinearity and related effects.
TL;DR: An explanation is put forth for the observed nonlinearity in the red spectral region of the response of silicon photodiodes, and correlation of non linearity with spatial nonuniformity of response is demonstrated.
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Multidecade linearity measurements on Si photodiodes
TL;DR: The experiments are based on a cascaded use of the linearity tester described by Sanders, which utilizes the double-aperture method, and the results are given.
Journal ArticleDOI
Comparison of two cryogenic radiometers by determining the absolute spectral responsivity of silicon photodiodes with an uncertainty of 0.02
Nigel Fox,J E Martin +1 more
TL;DR: To substantiate the NPL primary standard cryogenic radiometer as an absolute instrument it has been compared with the cryogen radiometer which was successfully used to determine the Stefan-Boltzmann constant.