Presentation
6 October 2023 Sensing via digital Stokes polarimetry and transport-of-intensity
Author Affiliations +
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
© (2023) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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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KEYWORDS
Polarimetry

Polarization

Wavefronts

Digital micromirror devices

LCDs

Micromirrors

Optical signal processing

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