Sensing via digital Stokes polarimetry and transport-of-intensity

Angela L. Dudley; Keshaan Singh; Andrew Forbes

doi:10.1117/12.2682044

6 October 2023 Sensing via digital Stokes polarimetry and transport-of-intensity

Angela L. Dudley, Keshaan Singh, Andrew Forbes

Proceedings Volume 12686, Infrared Remote Sensing and Instrumentation XXXI; 126860I (2023) https://doi.org/10.1117/12.2682044
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

In this work, we will present two techniques for extracting the wavefront and polarization structure of optical fields. The first being a digital analogy to Stokes polarimetry involving only four measurements, as opposed to the usual six. Here, we implement static polarisation optics, such as a Polarization Grating (PG) to project a mode into left- and right-circular states, which are subsequently directed to a Digital Micro-mirror Device (DMD) to impart a phase retardance for full phase and polarisation reconstruction. The second approach uses the transport-of-intensity which harnesses the connection between observed energy flow in optical fields and their wavefronts. We present a simple scheme using a DMD to perform angular spectrum propagation and extract the wavefront of optical fields. Finally, we demonstrate these approaches by spatially resolving complex polarization structures such as metasurfaces, liquid crystal devices and chiral materials.

Conference Presentation

Citation Download Citation

Angela L. Dudley, Keshaan Singh, and Andrew Forbes "Sensing via digital Stokes polarimetry and transport-of-intensity", Proc. SPIE 12686, Infrared Remote Sensing and Instrumentation XXXI, 126860I (6 October 2023); https://doi.org/10.1117/12.2682044

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