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Proceedings Paper

Midinfrared atmospheric transmittance measurements by using the second and third harmonics of tunable TEA-CO2 lasers
Author(s): Akiko Harasaki; Jun Sakuma; Toshie Itoh; Takao Chonan; Yoshiyuki Fukuyama; Ryuichi Horie; Masakatsu Sugii
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Paper Abstract

The middle-infrared wavelength region around 3-5 m corresponds to the best optical laser band for high atmospheric transmittance and eye-safety. Middle-infrared lasers are used in laser range finders, laser radars, and so on. There are only a few reports on the atmospheric laser transmittance of these middle-infrared optical bands. This paper describes, we believe for the first time, middle-infrared atmospheric transmittance characteristics as measured by the second and third harmonics of tunable TEA-CO2 lasers. The experimental results showed that the laser transmittance at 3.4 - 3.6 m correlated well with the results calculated by the HITRAN-PC code, assuming a middle-latitude, summer condition. The measured transmittance at 4.6 - 4.8 ,um exhibited a fine-structure, probably due to the absorption of atmospheric molecules such as NO2 and H20.

Paper Details

Date Published: 23 September 1997
PDF: 9 pages
Proc. SPIE 3125, Propagation and Imaging through the Atmosphere, (23 September 1997); doi: 10.1117/12.279031
Show Author Affiliations
Akiko Harasaki, Japan Defense Agency (Japan)
Jun Sakuma, Toshiba Corp. (Japan)
Toshie Itoh, Toshiba Corp. (Japan)
Takao Chonan, Japan Defense Agency (Japan)
Yoshiyuki Fukuyama, Japan Defense Agency (Japan)
Ryuichi Horie, Toshiba Corp. (Japan)
Masakatsu Sugii, Japan Defense Agency (Japan)


Published in SPIE Proceedings Vol. 3125:
Propagation and Imaging through the Atmosphere
Luc R. Bissonnette; Christopher Dainty, Editor(s)

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