Long Wavelength Infrared Heterodyne Detection

E. R. Washwell; S. K. Ichiki

doi:10.1117/12.955157

15 November 1976 Long Wavelength Infrared Heterodyne Detection

E. R. Washwell, S. K. Ichiki

Proceedings Volume 0095, Modern Utilization of Infrared Technology II; (1976) https://doi.org/10.1117/12.955157
Event: 20th Annual Technical Symposium, 1976, San Diego, United States

Abstract

The detection of molecular line radiation is of interest in a variety of applications such as atmospheric pollution monitoring, investigation of astronomical sources, and basic spectroscopic studies. In the following discussion, the heterodyne detection of molecular line radiation is shown to have significant advantages over direct detection at longer infrared wavelengths. The development of a heterodyne receiver operating in the long wavelength infrared region using tunable semiconductor laser local oscillators is described. The techniques used to operate the receiver at selectable descrete wavelengths are applicable to the entire spectral range covered by semiconductor lasers. Results are presented for the heterodyne receiver operating in the 24-μm spectral region.

Citation Download Citation

E. R. Washwell and S. K. Ichiki "Long Wavelength Infrared Heterodyne Detection", Proc. SPIE 0095, Modern Utilization of Infrared Technology II, (15 November 1976); https://doi.org/10.1117/12.955157

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