Atmospheric remote sensing via infrared-submillimeter double resonance

Srikantaiah, Sree

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https://hdl.handle.net/2142/91470 Copy

Description

Title

Atmospheric remote sensing via infrared-submillimeter double resonance

Author(s)

Srikantaiah, Sree

Contributor(s)

• De Lucia, Frank C.
• Everitt, Henry O.
• Phillips, Dane
• Neese, Christopher F.
• Holt, Jennifer

Issue Date

2016-06-22

Keyword(s)

Spectroscopy as an analytical tool

Abstract

Specificity and sensitivity in atmospheric pressure remote sensing have always been big challenges. This is especially true for approaches that involve the submillimeter/terahertz (smm/THz) spectral region because atmospheric pressure broadening precludes taking advantage of the small Doppler broadening in the region. The Infrared-submillimeter (IR-smm) double resonance spectroscopic technique allows us to obtain a more specific two-dimensional signature as well as a means of modulating the molecular signal to enhance its separation from background and system variation. Applying this technique at atmospheric pressure presents a unique bandwidth requirement on the IR pump laser, and the smm/THz receiver. We will discuss the pump system comprising of a CO2 TEA laser, plasma switch and a free induction decay hot cell designed to produce fast IR pulses on the time scale of atmospheric pressure relaxation and a high bandwidth fast pulse smm/THz receiver. System diagnostics will also be discussed. Results as a function of pressure and pump pulse width will be presented.

Publisher

International Symposium on Molecular Spectroscopy

Type of Resource

text

Language

En

Permalink

http://hdl.handle.net/2142/91470

Copyright and License Information

Copyright 2016 by the authors

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