Abstract

The paper is to introduce active spectroscopy of elastic light scattering. The new principal approach is based on the application of an innovative vector optical heterodyning technique for active signal processing, which appears to be available by beating several scattered vector waves within a square-low photo-detector by their registration [1]. While the classical spectroscopy of optical beating deals with the problem to study a scalar optical signal [2] that is due to elastic scattering of a single narrow-band laser beam, the active spectroscopy of elastic scattering deals with two vector waves simultaneously undergo simultaneous scattering by a scatterer. In case one of the vector waves (heterodyne) has strong periodical modulation of direction of polarization, Coherent Light Beating Scattering (CLBS) occurs [1], which units elastic Light Scattering and Coherent non-linear Beating (mixing) within the square-low photo-detector. As a result, the vector optical signal provides with the information about both size and velocity of a scatterer, which is not available for well-known spectroscopy of scalar optical beating [2].

© 2000 Optical Society of America