TITLE:
Photoacoustic Detection in the Michelson Interferometer Cavity
AUTHORS:
Mohammad I. Abu Taha, Ahmed S. Jabr
KEYWORDS:
Michelson Interferometer, Photoacoustic Effect, Photoacoustic Spectroscopy, Trace Gas Detection, Miniature Infrared Source
JOURNAL NAME:
Journal of Modern Physics,
Vol.5 No.9,
June
23,
2014
ABSTRACT:
For the
first time, we report photoacoustic (PA) signal detection in a cell placed
within the Michelson interferometer cavity in an attempt to relate
photoacoustic effect to the Michelson fringe shift as a result of changes in
the cell. Both detection schemes were investigated using IR absorption and
their sensitivities compared. Signals related to Michelson interferometer
fringe and PA effect have shown good correlations with each other using
different samples including some essential oils and their corresponding plant
part from which the essential oil is usually obtained. Results were encouraging
and will open the door widely to use the combined Michelson interferometer-photoacoustic
spectroscopy (PAS) in trace gas detection for different applications.