ABSTRACT
A. N. Dharamsi and Ying Lu; App. Phys. Letts., 65, 2257, 1994
A novel technique, employing high-order derivative absorption spectroscopy, is used to demonstrate that the
resolution of nearly overlapping lines, with disparate oscillator strengths,
can be obtained.The method employs
tunable diode lasers and does not require expensive wavelength-resolution
apparatus.An experimental
demonstration involving nearly overlapping lines of the weak (doubly forbidden
by the spin selection rule and the lack of an electric dipole oscillator
strength) A band of molecular oxygen is provided.The advantages of the method in being able to inexpensively
monitor the densities (and other properties) of more than one specie simultaneously,
and in the investigation of lineshape profiles, are briefly discussed also.
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