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Tb,Y:SrF2 crystal for efficient laser operation in the visible spectral region
Optics Letters
|February 15, 2022
Summary
This study reports the first continuous-wave visible laser based on a terbium (Tb)-doped strontium fluoride (SrF2) crystal. The novel Tb,Y:SrF2 laser achieved 259 mW output power with high efficiency, demonstrating potential for visible laser applications.
Area of Science:
- Solid-state laser physics
- Materials science
- Optical engineering
Background:
- Alkaline-earth fluoride crystals are promising laser gain media.
- Development of efficient visible lasers is crucial for various applications.
- Terbium-doped materials offer potential for visible light emission.
Purpose of the Study:
- To grow high-quality Tb,Y:SrF2 crystals.
- To investigate the spectroscopic and laser properties of Tb,Y:SrF2 in the visible region.
- To demonstrate a continuous-wave (CW) visible laser based on Tb,Y:SrF2.
Main Methods:
- High-quality Tb,Y:SrF2 crystal growth using the temperature gradient technique.
- Spectroscopic characterization including fluorescence lifetime measurements.
- CW laser performance evaluation at 545 nm.
Main Results:
- A fluorescence lifetime of 5.6 ms was measured, indicating suitability for low-threshold laser operation.
- A CW Tb,Y:SrF2 laser achieved 259 mW output power at 545 nm.
- A slope efficiency of 35.2% was obtained, representing the highest output power for visible alkaline-earth fluoride lasers to date.
Conclusions:
- Tb,Y:SrF2 is a promising material for efficient visible laser applications.
- The demonstrated laser performance highlights the potential of Tb-doped SrF2 for visible light generation.
- Further research can explore power scaling limitations and optimization strategies.
