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High-efficiency 1.9 µm Tm3+:LiLuF4 thin-disk laser.
Georg Stoeppler1, Daniela Parisi, Mauro Tonelli
1French-German Research Institute of Saint-Louis ISL, Saint-Louis, France. georg.stoeppler@isl.eu
Optics Letters
|April 3, 2012
Summary
This study demonstrates the first diode-pumped thulium-doped lithium lutetium tetrafluoride (Tm3+:LiLuF4) thin-disk laser operating near 1.9 μm. The laser achieved 21 W output power and tunable operation, showcasing its potential for various applications.
Area of Science:
- Laser Physics
- Solid-State Lasers
- Materials Science
Background:
- Thulium-doped materials are crucial for generating laser light in the mid-infrared spectrum.
- Thin-disk laser architectures offer excellent thermal management for high-power operation.
Purpose of the Study:
- To demonstrate the first diode-pumped Tm3+:LiLuF4 thin-disk laser.
- To characterize its performance in terms of output power, efficiency, and tunability.
Main Methods:
- Utilized a 792 nm diode laser for pumping a Tm3+:LiLuF4 thin-disk gain medium.
- Employed a resonant cavity design for laser oscillation around 1.9 μm.
- Inserted an etalon for tuning the laser output wavelength.
Main Results:
- Achieved up to 21 W of output power in a multimode configuration.
- Demonstrated a maximal slope efficiency of 49% and optical-to-optical efficiency of 40%.
- Obtained a tunable output range from 1899 nm to 1927 nm.
Conclusions:
- The Tm3+:LiLuF4 thin-disk laser is a viable platform for high-power, tunable mid-infrared laser generation.
- This work establishes a new benchmark for thulium-doped thin-disk lasers.
- The demonstrated performance highlights potential applications in spectroscopy and medical treatments.
