Compact Setup of a Tunable Heterodyne Spectrometer for Infrared Observations of Atmospheric Trace-Gases

Remote Sensing

Tobias Stangier¹  Guido Sonnabend¹ 

[1] I. Physikalisches Institut, University of Cologne, Zuelpicher Strasse 77, D-50937 Cologne, Germany; E-Mail:

关键词: heterodyne;    infrared;    spectroscopy;    atmosphere;    transmission;    ultra-high resolution;    ozone;    trace gas;    wind;   

DOI  :  10.3390/rs5073397

来源: mdpi

【 摘 要 】

We report on the development and characterization of the new compact infrared heterodyne receiver, iChips (Infrared Compact Heterodyne Instrument for Planetary Science). It is specially designed for ground-based observations of the terrestrial atmosphere in the mid-infrared wavelength region. Mid-infrared room temperature quantum cascade lasers are implemented into a heterodyne system for the first time. Their tunability allows the instrument to operate in two different modes. The scanning mode covers a spectral range of few wavenumbers continuously with a resolution of approximatelyand a bandwidth of 1.4 GHz. To demonstrate the instrument’s capabilities, initial observations in both modes were performed by measuring the terrestrial transmittance at 7.8 μm (∼ 1,285 cm⁻¹) and by probing terrestrial ozone features at 8.6 μm (∼ 1,160 cm⁻¹), respectively. The receivers characteristics and performance are described.

【 授权许可】

CC BY   
© 2013 by the authors; licensee MDPI, Basel, Switzerland