Method of optical tomography for studying the amplitude and phase components of a volume golographic grating

Abstract

By solving coupled-mode equations in laser Doppler tomography, expressions for output signals are found, which describe light diffraction on a volume grating with a mutual (in the general case) shift of the amplitude and phase components. Signal parameters that are least prone to the influence of uncontrolled characteristics of the optical system and studied medium are found. The phase shift between the signals of a two-channel heterodyne detector of scattered light is obtained as a function of the character of the amplitude-phase components of the test grating.