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Simultaneous emission of four TEM00-mode solar-pumped lasers
Applied Optics
|March 17, 2026
Summary
Researchers achieved the first simultaneous emission of four high-quality solar laser beams using multiple Ce:Nd:YAG rods. This breakthrough in solar laser technology sets new efficiency records for power conversion and collection.
Area of Science:
- Solar energy utilization
- Laser physics
- Materials science
Background:
- Improving laser beam quality (TEM00 mode) is crucial for solar laser applications.
- Multiple active media can mitigate thermal load, enhancing laser performance.
- Simultaneous emission of multiple TEM00 solar laser beams remained experimentally unexplored.
Purpose of the Study:
- To report the first experimental demonstration of simultaneous emission of multiple TEM00-mode solar laser beams.
- To investigate the performance of a novel solar laser system utilizing multiple active media.
- To establish new benchmarks for solar-to-laser power conversion and collection efficiencies.
Main Methods:
- Utilized a heliostat-parabolic mirror system at PROMES-CNRS for solar concentration.
- Employed a laser head with an aspheric lens, conical pump cavity, and four end-side pumped Ce:Nd:YAG rods.
- Configured for simultaneous emission of four TEM00-mode beams.
Main Results:
- Achieved a total TEM00-mode laser power of 6.05 W.
- Attained a collection efficiency of 8.77 W/m².
- Reached a solar-to-laser power conversion efficiency of 0.90%.
Conclusions:
- Demonstrated the first simultaneous emission of four TEM00-mode solar laser beams.
- The achieved efficiencies surpass previous records for solar laser systems with parabolic mirrors.
- This work paves the way for more scalable and efficient solar laser systems.
