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All-digital Stokes polarimetry with a digital micromirror device
Optics Letters
|April 15, 2020
Summary
This study introduces a fast, all-digital Stokes polarimetry method using a polarization grating and digital micromirror device. It rapidly measures optical field polarization without moving parts, enabling real-time analysis.
Area of Science:
- Optics and Photonics
- Quantum Information Science
Background:
- Stokes polarimetry is crucial for analyzing optical field polarization.
- Traditional methods often require multiple measurements and mechanical components, limiting speed and introducing errors.
Purpose of the Study:
- To develop a rapid, all-digital Stokes polarimetry technique.
- To eliminate the need for moving optical components in polarization measurements.
Main Methods:
- Utilized a polarization grating (PG) to split light into circular polarized states.
- Employed a polarization-insensitive digital micromirror device (DMD) for digital phase retardance introduction.
- Acquired four intensity measurements digitally for complete polarization state determination.
Main Results:
- Successfully demonstrated a real-time, all-digital polarimetry system.
- Achieved accurate measurements of the Stokes parameters (SoP), vectorness, and intramodal phase.
- Showed excellent agreement between experimental results and theoretical predictions.
Conclusions:
- The proposed digital polarimetry method offers a significant advancement in speed and simplicity.
- This technique eliminates mechanical components, enhancing robustness and reducing potential errors.
- Enables fast, real-time characterization of optical field polarization for various applications.
