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Liquid-crystal based drift-free polarization modulators: Part II. Ultra-stable Stokes and Mueller polarimeters.
Optics Express
|May 9, 2023
Summary
New liquid-crystal polarization modulators (LCMs) offer stable performance in polarimeters, acting as temperature-stable alternatives to liquid-crystal variable retarders (LCVRs). This research demonstrates their accuracy for demanding applications.
Area of Science:
- Optics and Photonics
- Polarimetry
- Liquid Crystal Devices
Background:
- Liquid-crystal variable retarders (LCVRs) are widely used in polarimetry but can suffer from temperature instability.
- Drift-free liquid-crystal polarization modulators (LCMs) have been developed as a potential alternative.
Purpose of the Study:
- To evaluate the performance of novel drift-free LCMs in Stokes and Mueller polarimeters.
- To compare LCM-based polarization state analyzers (PSAs) with traditional LCVR-based PSAs.
Main Methods:
- Characterization of LCM performance in polarimetric setups.
- Construction and testing of an LCM-based PSA.
- Comparative analysis against an LCVR-based PSA across a temperature range (25°C–50°C).
Main Results:
- LCMs exhibit polarimetric responses comparable to LCVRs.
- The LCM-based PSA demonstrated stable system parameters over a wide temperature range.
- Accurate Stokes and Mueller measurements were achieved.
Conclusions:
- LCMs serve as effective, temperature-stable replacements for LCVRs in polarimetry.
- The developed LCM-based PSA shows promise for calibration-free polarimeters in demanding applications.
