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Single-frequency fiber Fabry-Perot Brillouin laser
Optics Letters
|October 1, 2022
Summary
We achieved single-frequency stimulated Brillouin lasing in short fiber resonators. This breakthrough enables compact, efficient narrow-linewidth light sources with a sub-milliwatt threshold.
Area of Science:
- Photonics
- Laser Physics
- Optical Resonators
Background:
- Stimulated Brillouin scattering (SBS) is a nonlinear optical process.
- Fiber Fabry-Perot resonators are crucial for light manipulation.
- Achieving single-frequency lasing in compact resonators remains a challenge.
Purpose of the Study:
- To demonstrate single-frequency stimulated Brillouin lasing in short fiber Fabry-Perot resonators.
- To investigate the impact of resonator properties on lasing behavior.
- To enable compact and efficient narrow-linewidth light sources.
Main Methods:
- Utilizing short fiber Fabry-Perot resonators with high quality factors (∼1.5 × 108).
- Employing fiber Bragg gratings to engineer dispersion characteristics.
- Observing and analyzing stimulated Brillouin lasing thresholds and spectra.
Main Results:
- Demonstrated single-frequency stimulated Brillouin lasing.
- Achieved a sub-milliwatt threshold for lasing.
- Observed unequal frequency separations of longitudinal modes, suppressing cascaded lasing.
Conclusions:
- Short fiber Fabry-Perot resonators can support single-frequency stimulated Brillouin lasing.
- High quality factors and engineered dispersion are key to achieving low thresholds and single-frequency operation.
- This work paves the way for compact, robust, and efficient narrow-linewidth light sources.
