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Related Experiment Video

Updated: Jan 19, 2026

Polarimeter: Concept of Chirality, Enantiomers, Optical Rotation

Polarimeter: Concept of Chirality, Enantiomers, Optical Rotation

Published on: April 30, 2023

Method to calibrate a full-Stokes polarimeter based on variable retarders.

Ivan Montes-González, Neil C Bruce, Oscar G Rodríguez-Herrera

|September 11, 2019

Summary

This study introduces a new calibration method for full-Stokes polarimeters. The technique significantly reduces measurement errors, improving polarization state analysis accuracy.

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Retarders

Retarders

Area of Science:

Optics and Photonics
Polarimetry
Instrumentation

Background:

Accurate measurement of light polarization is crucial in various scientific fields.
Full-Stokes polarimeters, utilizing components like liquid-crystal variable retarders (LCVRs), are essential for this task.
Existing calibration methods may not fully account for experimental setup errors, impacting measurement precision.

Purpose of the Study:

To develop and validate a novel calibration method for a full-Stokes polarimeter.
To quantify and correct for experimental errors, including axes alignment and retarder retardance inaccuracies.
To improve the overall accuracy and reliability of Stokes parameter measurements.

Main Methods:

A calibration method was developed by fitting experimental intensity data from calibration samples to a theoretical polarimeter model incorporating errors.
The method specifically addresses axes alignment errors and retardance errors in both LCVRs.
Calibration parameter accuracy was verified by analyzing the polarization state of light passing through known optical elements (rotating polarizer, wave plates).

Main Results:

The proposed calibration method effectively calculates experimental setup errors.
Verification measurements demonstrated a significant reduction in root-mean-square (rms) error.
An average reduction in rms error of 55.8% was achieved using the developed calibration technique.

Conclusions:

The presented calibration method offers a robust solution for improving full-Stokes polarimeter accuracy.
Accurate calibration is essential for reliable polarization state analysis.
This method provides a practical approach to minimize errors in polarimetric measurements.