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Intense Brillouin amplification in gas using hollow-core waveguides
Fan Yang1, Flavien Gyger1, Luc Thévenaz1
1Ecole Polytechnique Fédérale de Lausanne (EPFL), Group for Fibre Optics, Lausanne, Switzerland.
Nature Photonics
|April 7, 2021
Summary
Researchers achieved significant Brillouin amplification in gas-filled hollow-core fibers. This breakthrough offers six times higher gain than solid silica fibers, enabling new photonic applications.
Area of Science:
- Nonlinear optics
- Photonics
Background:
- Stimulated Brillouin scattering (SBS) provides high gain in solid materials for photonics.
- Gases' compressibility suggests potential for enhanced SBS efficiency.
Purpose of the Study:
- To investigate SBS in gas-filled hollow-core fibers.
- To achieve high Brillouin amplification per unit length.
Main Methods:
- Utilized a high-pressure gas-filled hollow-core fiber.
- Investigated light confinement and acoustic properties at high pressure.
Main Results:
- Achieved Brillouin amplification six times greater than in solid silica fibers.
- Demonstrated strong amplification per unit length due to high molecular density and low acoustic attenuation.
- Showcased a low-threshold gas Brillouin fiber laser and a strain-insensitive distributed temperature sensor.
Conclusions:
- Hollow-core fibers offer superior Brillouin amplification compared to solid-core fibers.
- This technology enables efficient optical amplification, lasing, and sensing applications.
