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Polarisation control through an optical feedback technique and its application in precise measurements
Wenxue Chen1, Shulian Zhang, Xingwu Long
1Department of Opto-electronic Engineering, College of Opto-electronic Science and Engineering, National University of Defense Technology, Changsha 410073, China.
Scientific Reports
|June 18, 2013
Summary
This study introduces an anisotropic optical feedback method for precise light polarization control. The technique achieves high accuracy in measuring optical properties like phase retardation and refractive index.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Controlling light polarization is crucial in various optical applications.
- Existing methods may lack precision or versatility.
Purpose of the Study:
- To develop and validate a novel anisotropic optical feedback technique.
- To enable high-precision measurement of optical parameters.
Main Methods:
- Anisotropic optical feedback principle.
- Integration of Lamb's semi-classical theory.
- Modeling of Fabry-Perot interferometer equivalent cavity.
Main Results:
- Demonstrated control over light polarization.
- Achieved high precision measurements: phase retardation (λ/1380), optical axis (0.01°), angle (0.002°), thickness (59 nm), refractive index (0.0006).
Conclusions:
- The anisotropic optical feedback technique offers superior precision.
- The developed physical model elucidates the technique's underlying principles.
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