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Proceedings Paper

Cryogenic Fourier transform spectrometer for infrared spectral calibrations from 4 to 20 micrometers
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Paper Abstract

We present initial performance data from a cryogenic Fourier transform spectrometer (Cryo-FTS) designed for lowbackground spectral infrared calibrations. The Cryo-FTS operates at a temperature of approximately 15 K and has been integrated into an infrared transfer radiometer containing a calibrated Si:As blocked impurity band (BIB) detector. Because of its low operating temperature, the spectrometer exhibits negligible thermal background signal and low drift. Data from tests of basic spectrometer function, such as modulation efficiency, scan jitter, spectral range, spectral resolution and sweep speed will be presented. We will also discuss calibration techniques and results pertinent to operation of the Cryo-FTS as part of a calibration instrument, including background, signal offset and gain, and spectral noise equivalent power. The spectrometer is presently limited to wavelengths below 25 micrometers but can be in principle extended to longer wavelengths by replacing its KBr beamsplitter with another beamsplitter engineered for use beyond 25 micrometers.

Paper Details

Date Published: 4 May 2010
PDF: 9 pages
Proc. SPIE 7660, Infrared Technology and Applications XXXVI, 76602I (4 May 2010); doi: 10.1117/12.850392
Show Author Affiliations
Solomon I. Woods, National Institute of Standards and Technology (United States)
Simon G. Kaplan, National Institute of Standards and Technology (United States)
Timothy M. Jung, National Institute of Standards and Technology (United States)
Adriaan C. Carter, National Institute of Standards and Technology (United States)
Raju U. Datla, National Institute of Standards and Technology (United States)


Published in SPIE Proceedings Vol. 7660:
Infrared Technology and Applications XXXVI
Bjørn F. Andresen; Gabor F. Fulop; Paul R. Norton, Editor(s)

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