Extensions of quartz-enhanced photoacoustic spectroscopy

Author(s)
Masurkar, Amrita V
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Massachusetts Institute of Technology. Dept. of Physics.
Advisor
Rajeev Ram and Marin Soljacic.
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Abstract
The goal of this thesis was to perform quartz-enhanced photoacoustic spectroscopy (QEPAS) on trace concentrations of NH3 in the 1.53 pm region with a DFB laser without the use of a resonating cavity. I analyzed the process of QEPAS both analytically and experimentally. First, absorption spectroscopy was performed with a 1.55 pm DFB laser on the 1558.033 nm absorption line of H13C12N. The wavelength of the laser radiation was then modulated, and the spectral components of the absorbance were analyzed. In addition, low concentrations of NH3 were generated through the use of a vacuum system, and absorption spectroscopy was performed on these samples. A tuning fork was also characterized. Photoacoustic signals were ultimately not realized, however, plans for future work are mentioned.
Description
Thesis (S.B.)--Massachusetts Institute of Technology, Dept. of Physics, 2009.
 
Includes bibliographical references (p. 57-58).
 
Date issued
2009
URI
http://hdl.handle.net/1721.1/51579
Department
Massachusetts Institute of Technology. Department of Physics
Publisher
Massachusetts Institute of Technology
Keywords
Physics.
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