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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 14 — May. 10, 2005
  • pp: 2870–2878

Breadboard of a Fourier-transform spectrometer for the Radiation Explorer in the Far Infrared atmospheric mission

Luca Palchetti, Giovanni Bianchini, Francesco Castagnoli, Bruno Carli, Carmine Serio, Francesco Esposito, Vincenzo Cuomo, Rolando Rizzi, and Tiziano Maestri  »View Author Affiliations


Applied Optics, Vol. 44, Issue 14, pp. 2870-2878 (2005)
http://dx.doi.org/10.1364/AO.44.002870


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Abstract

In preparation for a possible space mission, a breadboard version named REFIR-BB of the Radiation Explorer in the Far Infrared (REFIR) instrument has been built. The REFIR is a Fourier-transform spectrometer with a new optical layout operating in the spectral range 100–1100 cm−1 with a resolution of 0.5 cm−1, a7-s acquisition time, and a signal-to-noise ratio of better than 100. Its mission is the spectral measurement in the far infrared of the Earth's outgoing emission, with particular attention to the long-wavelength spectral region, which is not covered by either current or planned space missions. This measurement is of great importance for deriving an accurate estimate of the radiation budget in both clear and cloudy conditions. The REFIR-BB permits the trade-off among all instrument parameters to be studied, the optical layout to be tested, and the data-acquisition strategy to be optimized. The breadboard could be used for high-altitude ground-based campaigns or could be flown for test flights on aircraft or balloon stratospheric platforms. The breadboard's design and the experimental results are described, with particular attention to the acquisition strategy and characterization of the interferometer. Tests were performed both in laboratory conditions and in vacuum. Notwithstanding a loss of efficiency above 700 cm−1 caused by the poor performance of the photolithographic polarizers used as beam splitters, the results demonstrate the feasibility of using the spectrometer for space applications.

© 2005 Optical Society of America

OCIS Codes
(010.0010) Atmospheric and oceanic optics : Atmospheric and oceanic optics
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(300.6270) Spectroscopy : Spectroscopy, far infrared
(300.6300) Spectroscopy : Spectroscopy, Fourier transforms

History
Original Manuscript: June 14, 2004
Manuscript Accepted: November 19, 2004
Published: May 10, 2005

Citation
Luca Palchetti, Giovanni Bianchini, Francesco Castagnoli, Bruno Carli, Carmine Serio, Francesco Esposito, Vincenzo Cuomo, Rolando Rizzi, and Tiziano Maestri, "Breadboard of a Fourier-transform spectrometer for the Radiation Explorer in the Far Infrared atmospheric mission," Appl. Opt. 44, 2870-2878 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-14-2870

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