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113 W Ho:YLF oscillator with good beam quality efficiently pumped by a Tm:YAP laser
Applied Optics
|October 18, 2022
Summary
We developed a high-power thulium-doped YAP (Tm:YAP) slab laser, achieving 202 W output power. This laser efficiently pumped a holmium-doped YLF (Ho:YLF) laser to 113 W, demonstrating a powerful two-stage laser system.
Area of Science:
- Laser Physics
- Materials Science
Background:
- High-power laser sources are crucial for various scientific and industrial applications.
- Efficient conversion of pump light to laser output is a key challenge in laser design.
Purpose of the Study:
- To demonstrate a high-power, linearly polarized Tm:YAP slab laser.
- To utilize the Tm:YAP laser as a pump source for a Ho:YLF laser oscillator.
Main Methods:
- Fiber-coupled laser diode pumping of a Tm:YAP slab.
- Characterization of Tm:YAP laser output power, efficiency, and beam quality.
- Pumping a Ho:YLF oscillator with the Tm:YAP laser and evaluating its performance.
Main Results:
- Achieved a maximum output power of 202 W at 1937.5 nm from the Tm:YAP laser with 47.4% slope efficiency.
- Obtained a maximum output power of 113 W at 2063.3 nm from the Ho:YLF laser with 55.9% optical-to-optical efficiency.
- Demonstrated good beam quality (M² ~1.5) for the Ho:YLF laser at maximum power.
Conclusions:
- The Tm:YAP slab laser is an effective high-power pump source for Ho:YLF lasers.
- This two-stage laser system offers a promising route to high-power, efficient laser generation at eye-safe wavelengths.
