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Polarization maintaining single-mode low-loss hollow-core fibres
John M Fini1, Jeffrey W Nicholson1, Brian Mangan1
1OFS Laboratories, Somerset, New Jersey 08873, USA.
Nature Communications
|October 29, 2014
Summary
Researchers developed the first single-mode, polarization-maintaining hollow-core fibre (HCF) with a large core. This breakthrough overcomes modal coupling issues, enabling HCFs for advanced sensing and communication applications.
Area of Science:
- Optical Physics
- Materials Science
- Photonics Engineering
Background:
- Hollow-core fibres (HCFs) offer unique light-guiding properties for sensing and communications.
- Uncontrolled mode coupling and polarization drift limit the adoption of HCF technology.
- Achieving modal and polarization control is crucial for realizing HCFs' full potential.
Purpose of the Study:
- To present the first single-moded, polarization-maintaining hollow-core fibre with a large core size.
- To enable loss scaling and practical applications of HCFs by addressing modal and polarization instability.
- To overcome limitations hindering the widespread adoption of hollow-core fibre technology.
Main Methods:
- Development of a novel resonant coupling scheme to eliminate unwanted transverse modes, achieving single modedness.
- Engineering of fiber birefringence through the fabrication of an asymmetrical glass web surrounding the core.
- Fabrication of a large-core hollow-core fibre demonstrating both single modedness and polarization maintenance.
Main Results:
- Demonstration of the first large-core hollow-core fibre that is simultaneously single-moded and polarization-maintaining.
- Successful suppression of unwanted transverse modes via resonant coupling.
- Controlled birefringence achieved through asymmetrical core-web design.
Conclusions:
- The presented hollow-core fibre design overcomes key limitations in modal and polarization control.
- This advancement paves the way for practical implementation of HCFs in demanding applications like high-precision sensing and nonlinear-free communications.
- The developed technology enables loss scaling and unlocks new regimes for light propagation in hollow-core fibres.
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