Compact and high-speed Stokes polarimeter using three-way polarization-preserving beam splitters

Area of Science:

• Optics and Photonics
• Polarimetry
• Optical Measurement Systems

Background:

• Accurate measurement of light polarization states is crucial in various scientific and industrial applications.
• Existing methods for Stokes parameter measurement often involve mechanical components or electrical tuning, limiting speed and compactness.

Purpose of the Study:

• To develop a novel, real-time Stokes parameter measurement technique.
• To create a compact and motion-free optical system for polarization analysis.
• To achieve high-speed measurement of dynamic polarization states.

Main Methods:

• Utilized three polarized beam splitters in a compact optical setup (52x30x25 mm).
• Employed a system capable of analyzing polarization states at 30 kHz, limited by detector speed.
• Validated the technique by measuring arbitrary polarization states and dynamic polarization changes.

Main Results:

• Achieved measurement accuracy better than 0.006 for normalized Stokes parameters.
• Demonstrated real-time analysis of polarization states from a rotating quarter-wave plate.
• Successfully measured time-dependent stress-induced polarization changes in a PMMA block.

Conclusions:

• The developed technique offers a compact, high-speed, and accurate solution for Stokes parameter measurement.
• The system's ability to analyze dynamic polarization states opens possibilities for new applications in material science and optical metrology.
• Elimination of mechanical motion and electrical tuning simplifies the system and enhances its robustness.