Spectropolarimetric measurement system based on spatially modulated heterodyne interference

Abstract

The design goals of a spectropolarimetric system are higher spectropolarimetric resolution， a smaller and lighter system， and static measurement of the full Stokes spectrum. Therefore， the spatially modulated heterodyne interference spectropolarimetric system， which combines the technologies of intensi• ty modulation and spatial heterodyne was proposed. While the process of all mathematical derivation was displayed， the principle and structure of the system were presented and a theoretical analysis of the interfer• ogram data acquisition and full Stokes parameters demodulation restoration was carried out. The matching modulator module was designed and a complete design example was finished based on the parameters of the spatial heterodyne spectrometer used. A principle experimental device of spatially modulated hetero• dyne interference spectropolarimetric system was established in the laboratory， and the feasibility of the 文章编号 1004-924X (2023)07-0992-08