Abstract
We propose a novel group delay reference for optical communication systems based on a molecular gas cell absorption characteristic. A 1.53µm C2H2 acetylene gas absorption cell commonly used as a wavelength reference is shown to have an important dispersive nature that forms the basis of a novel group delay reference. Group delay measurements are compared to the theoretical predictions based on the amplitude response of the molecular gas cell. The formulated analytical approach is applicable to an arbitrary absorption spectra described by a Lorentzian function.
© 2001 Optical Society of America
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