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Pure chiral optical fibres
L Poladian1, M Straton, A Docherty
1Institute of Photonics and Optical Science (IPOS), School of Mathematics and Statistics, The University of Sydney, NSW, Australia. leon.poladian@sydney.edu.au
Optics Express
|January 26, 2011
Summary
Pure chiral optical fibres utilize optical activity for light guidance, unlike traditional refractive index-based fibres. These novel fibres show distinct behaviours for left- and right-hand circular polarisations, enabling unique optical isolation and guidance properties.
Area of Science:
- Optics and Photonics
- Materials Science
Background:
- Traditional optical fibres rely on refractive index contrast for light guidance.
- Chiral materials exhibit optical activity, a property not typically exploited for waveguiding.
Purpose of the Study:
- To investigate the properties of optical fibres made from chiral materials, termed pure chiral fibres.
- To mathematically formulate and analyze the modal properties of pure chiral fibres.
- To compare the performance of chiral fibres with non-chiral counterparts.
Main Methods:
- Developed a mathematical formulation for solving modes in circularly symmetric pure chiral fibres.
- Examined step-index, Bragg, and photonic crystal fibre designs.
- Analyzed guidance and polarization properties for left- and right-hand circular polarizations.
Main Results:
- Pure chiral fibres exhibit different guidance and polarization behaviors for left- and right-hand circular polarizations.
- These fibres allow for isolation and/or guidance of specific circular polarizations through distinct mechanisms.
- Performance differences were observed compared to equivalent non-chiral fibres.
- Quantified the necessary optical activity strength for different fibre designs.
Conclusions:
- Pure chiral fibres offer novel waveguiding mechanisms based on optical activity.
- The distinct polarization-dependent behavior opens possibilities for advanced optical devices.
- Further research can explore applications leveraging these unique chiral fiber properties.
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