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High efficiency quasi-three level thin film laser enabled on a sinusoidal grating substrate.
Optics Express
|March 1, 2017
Summary
This study presents a Yb-doped thin film on a 1D grating structure to enhance optical efficiency in optically pumped lasers. The nanostructure design boosts light absorption, improving laser performance.
Area of Science:
- Optics and Photonics
- Materials Science
- Laser Physics
Background:
- Optical material properties are tunable via nanostructures for high-efficiency lasers.
- Optically pumped lasers often require enhanced absorption, especially with short absorption lengths and high pump thresholds.
Purpose of the Study:
- To theoretically investigate a Yb-doped thin film on a 1D grating structure.
- To enhance optical efficiency in optically pumped solid-state lasers.
Main Methods:
- Utilizing guided-mode resonance theory to enhance local optical fields.
- Applying rigorous coupled-wave theory for nanostructure parameter analysis.
- Designing a Yb-doped thin film integrated with a 1D grating structure.
Main Results:
- Achieved simultaneous high reflectivity at both pump and emission wavelengths.
- Demonstrated enhanced local optical field due to high reflectivity.
- Showcased increased absorption of laser wavelengths within the nanostructure.
- Optimized nanostructure parameters for improved laser performance.
Conclusions:
- The designed Yb-doped thin film on a 1D grating structure effectively improves optical efficiency.
- This nanostructure approach offers a viable method for enhancing optically pumped solid-state lasers.
