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Random lasing from optical fibers with phase separated glass cores
Optics Express
|August 6, 2020
Summary
Researchers developed a novel random fiber laser using enhanced Rayleigh scattering for efficient lasing. This low threshold laser operates at 1050 nm and shows potential for various applications.
Area of Science:
- Photonics
- Fiber Optics
- Laser Physics
Background:
- Random lasers offer unique properties but often require long scattering media.
- Developing efficient random lasers with low thresholds is crucial for practical applications.
Purpose of the Study:
- To propose and present a novel random fiber laser design.
- To investigate the lasing characteristics of a fiber with enhanced Rayleigh scattering.
Main Methods:
- Integration of a passive optical fiber with a phase-separated aluminosilicate core-silica cladding as the feedback medium.
- Utilizing a Ytterbium (Yb)-doped fiber as the gain medium.
- Characterization of the laser's threshold power, output spectrum, and coherence.
Main Results:
- Achieved lasing at 1050 nm with a significantly reduced fiber length (4 m) due to enhanced Rayleigh scattering.
- Observed a low threshold power requirement for laser operation.
- Demonstrated high spatial coherence, spectral broadening with increasing input power, and temporal spectral variation.
Conclusions:
- The novel random fiber laser design is effective and requires minimal fiber length.
- The laser's low threshold and tunable properties open avenues for further research.
- This work facilitates future studies and applications of low threshold random fiber lasers.
