Improved Near-Infrared Spectral Responsivity Scale

A cryogenic radiometer-based system was constructed at the National Institute of Standards and Technology for absolute radiometric measurements to improve detector spectral power responsivity scales in the wavelength range from 900 nm to 1800 nm. In addition to the liquid-helium-cooled cryogenic radiometer, the system consists of a 100 W quartz-tungsten-halogen lamp light source and a 1 m single-grating monochromator for wavelength selection. The system was characterized and the uncertainty in spectral power responsivity measurements evaluated. A variety of photodetectors, including indium gallium arsenide photodiodes (InGaAs), germanium (Ge) photodiodes, and pyroelectric detectors, were subsequently calibrated. Over most of the spectral range, the spectral power responsivity of the photodetectors can be measured with a combined relative standard uncertainty of 0.4 % or less. This is more than a factor of two smaller than our previous capabilities, and represents a significant improvement in the near infrared (NIR) spectral power responsivity scale maintained at NIST. We discuss the characterization of the monochromator-based system and present results of photodetector spectral power responsivity calibrations.

[1]  Nigel P. Fox,et al.  Trap Detectors and their Properties , 1991 .

[2]  T. Quinn,et al.  A radiometric determination of the Stefan-Boltzmann constant and thermodynamic temperatures between -40 °C and +100 °C , 1985, Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences.

[3]  R. Gupta,et al.  New ultraviolet radiometry beamline at the Synchrotron Ultraviolet Radiation Facility at NIST , 1998 .

[4]  Thomas C. Larason,et al.  NIST Measurement Services: Spectroradiometric Detector Measurements: Part I - Ultraviolet Detectors and Part II - Visible to Near-Infrared Detectors | NIST , 1998 .

[5]  Nigel P. Fox,et al.  A Cryogenic Radiometer for Absolute Radiometric Measurements , 1985 .

[6]  L. Boivin,et al.  Monochromator-based cryogenic radiometry at the NRC , 1995 .

[7]  Steven J. Choquette,et al.  cSRM 2035: a rare-earth oxide glass for the wavelength calibration of near-infrared dispersive and Fourier transform spectrometers , 1998, Optics & Photonics.

[8]  J. M. Houston,et al.  Realization of a scale of absolute spectral response using the National Institute of Standards and Technology high-accuracy cryogenic radiometer. , 1996, Applied optics.

[9]  C. Cromer,et al.  National Institute of Standards and Technology high-accuracy cryogenic radiometer. , 1996, Applied optics.

[10]  Joachim Fischer,et al.  Characterization of Photodiodes in the UV and Visible Spectral Region Based on Cryogenic Radiometry , 1993 .

[11]  S. S. Bruce,et al.  The NIST High Accuracy Scale for Absolute Spectral Response from 406 nm to 920 nm , 1996, Journal of research of the National Institute of Standards and Technology.

[12]  Leonard M. Hanssen,et al.  Development of a monochromatic, uniform source facility for calibration of radiance and irradiance detectors from 0.2 ?m to 12 ?m , 1998 .

[13]  A J F Metherell,et al.  Precision Measurement and Fundamental Constants II , 1985 .

[14]  U Arp,et al.  Ultraviolet radiometry with synchrotron radiation and cryogenic radiometry. , 1999, Applied optics.

[15]  Barry N. Taylor,et al.  Guidelines for Evaluating and Expressing the Uncertainty of Nist Measurement Results , 2017 .