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Patterned Photostimulation with Digital Micromirror Devices to Investigate Dendritic Integration Across Branch Points

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All-digital Stokes polarimetry with a digital micromirror device.

Amogh Manthalkar, Isaac Nape, Najmeh Tabe Bordbar

|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.

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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.