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Topographic Target Light scattering - Differential Optical Absorption Spectroscopy (ToTAL-DOAS) is a novel atmospheric monitoring technique to obtain atmospheric trace gas concentrations from scattered sunlight measurements. The main issue to successfully apply this method is the need of a telescope to identify the targets clearly and efficiently couple light in a spectrometer. Also the need of measurements...
A novel retrieval algorithm for the refractive-index profile of optical fibers from transverse interferograms is presented. This algorithm allows a quick and simple index-profile reconstruction even in the presence of measurement noise and near the fiber axis. The response to noise of different retrieval algorithms is discussed and computer simulations are presented.
A geometrical optics approach to scattering from an optical side-illuminated by a laser beam at oblique incidence is presented. Our approach describes the interference pattern appearing in a region centered at a scattering angle of 180° from the direction of the incident beam. It will be shown that there exists a critical incidence angle for which a bright spot in the pattern of backscattered light...
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