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Efficient Q-switched Tm:YAG ceramic slab laser.

Shuaiyi Zhang¹, Mingjian Wang, Lin Xu

¹Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China.

|January 26, 2011

Summary

Efficient diode end-pumped Thulium-doped Yttrium Aluminum Garnet (Tm:YAG) ceramic lasers were demonstrated. The study highlights Tm:YAG ceramic

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Area of Science:

Materials Science
Laser Physics
Solid-State Lasers

Background:

Thulium-doped Yttrium Aluminum Garnet (Tm:YAG) ceramics are promising materials for high-efficiency 2-μm lasers.
Understanding the characteristics of Tm:YAG ceramic is crucial for developing advanced laser systems.

Purpose of the Study:

To analyze the characteristics of Tm:YAG ceramic for high-efficiency 2-μm laser applications.
To demonstrate efficient diode end-pumped continuous-wave (cw) and Q-switched Tm:YAG ceramic lasers.

Main Methods:

Experimental analysis of Tm:YAG ceramic properties.
Diode end-pumping configuration for continuous-wave (cw) laser operation.
Q-switching technique for pulsed laser operation.

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Main Results:

Maximum continuous wave (cw) output power of 17.2 W at ~2016 nm achieved with 32.3% optical conversion efficiency.
Slope efficiency of 36.5% demonstrated in cw operation.
Shortest Q-switched pulse width of 69 ns obtained at 500 Hz, with 20.4 mJ single pulse energy.

Conclusions:

Tm:YAG ceramic exhibits excellent characteristics for efficient 2-μm laser development.
Demonstrated performance in both cw and Q-switched modes validates the potential of Tm:YAG ceramic lasers.
The material shows excellent energy storage capability, crucial for pulsed laser applications.