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Title: Intracavity absorption with a continuous wave dye laser: quantification for a narowband absorber

Abstract

Although it is recognized as a very sensitive detection technique, the general application of intracavity absorption to areas such as chemical kinetics and photochemistry has been somewhat limited. Concerns are frequently expressed about the nonlinear nature, experimental difficulty, and reliability of the technique. To allay some of these objections, the dependence of intracavity absorption on factors such as transition strength, concentration, absorber path length, and pump power has been investigated experimentally for a cw dye laser with a narrowband absorber (NO/sub 2/). For this case a Beer-Lambert type relationship has been confirmed over a useful range of these parameters. The extent of intracavity absorption was quantitatively measured directly from the dye laser spectral profiles and, when compared to extracavity measurements, indicated enhancements as high as 12,000 for pump powers near lasing threshold. By defining an intracavity absorption coefficient, it was possible to demonstrate the reliability of the method by obtaining accurate transition strength ratios.

Authors:
;
Publication Date:
Research Org.:
NASA Goddard Space Flight Center, Laboratory for Extraterrestrial Physics, Astrochemistry Branch, Greenbelt, Maryland 20771
OSTI Identifier:
6223448
Resource Type:
Journal Article
Journal Name:
Appl. Opt.; (United States)
Additional Journal Information:
Journal Volume: 26:17
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; DYE LASERS; LINE BROADENING; PERFORMANCE TESTING; ABSORPTION SPECTROSCOPY; CHEMICAL REACTION KINETICS; LASER CAVITIES; NITROGEN DIOXIDE; CHALCOGENIDES; KINETICS; LASERS; LIQUID LASERS; NITROGEN COMPOUNDS; NITROGEN OXIDES; OXIDES; OXYGEN COMPOUNDS; REACTION KINETICS; SPECTROSCOPY; TESTING; 420300* - Engineering- Lasers- (-1989)

Citation Formats

Brobst, W D, and Allen, Jr, J E. Intracavity absorption with a continuous wave dye laser: quantification for a narowband absorber. United States: N. p., 1987. Web. doi:10.1364/AO.26.003663.
Brobst, W D, & Allen, Jr, J E. Intracavity absorption with a continuous wave dye laser: quantification for a narowband absorber. United States. https://doi.org/10.1364/AO.26.003663
Brobst, W D, and Allen, Jr, J E. Tue . "Intracavity absorption with a continuous wave dye laser: quantification for a narowband absorber". United States. https://doi.org/10.1364/AO.26.003663.
@article{osti_6223448,
title = {Intracavity absorption with a continuous wave dye laser: quantification for a narowband absorber},
author = {Brobst, W D and Allen, Jr, J E},
abstractNote = {Although it is recognized as a very sensitive detection technique, the general application of intracavity absorption to areas such as chemical kinetics and photochemistry has been somewhat limited. Concerns are frequently expressed about the nonlinear nature, experimental difficulty, and reliability of the technique. To allay some of these objections, the dependence of intracavity absorption on factors such as transition strength, concentration, absorber path length, and pump power has been investigated experimentally for a cw dye laser with a narrowband absorber (NO/sub 2/). For this case a Beer-Lambert type relationship has been confirmed over a useful range of these parameters. The extent of intracavity absorption was quantitatively measured directly from the dye laser spectral profiles and, when compared to extracavity measurements, indicated enhancements as high as 12,000 for pump powers near lasing threshold. By defining an intracavity absorption coefficient, it was possible to demonstrate the reliability of the method by obtaining accurate transition strength ratios.},
doi = {10.1364/AO.26.003663},
url = {https://www.osti.gov/biblio/6223448}, journal = {Appl. Opt.; (United States)},
number = ,
volume = 26:17,
place = {United States},
year = {1987},
month = {9}
}