ABSTRACT
A. N. Dharamsi, P. Shea and A. M. Bullock; App. Phys. Lett.; 72, 3118, 1998.
One of the factors limiting the sensitivity of
wavelength modulation experiments is the fringing that is created by
inadvertent multiple reflections between parallel optical surfaces in the
apparatus. It is shown that the effects
of this “etaloning” can be countered by using detection harmonic orders greater
than the second. A theoretical basis for the effect is presented and compared
with experimental results obtained.
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Modulation Spectroscopy