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Electro-optically cavity-dumped 3 ns Tm:LuAG laser.

Ye Zhang, Baoquan Yao, Tongyu Dai

|May 4, 2016

Summary

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A novel Tm:LuAG laser achieves high power and constant 3 ns pulses at 2012.7 nm. This cavity-dumped electro-optic Q-switching technology enables high repetition rates up to 100 kHz.

Area of Science:

Lasers and Photonics
Materials Science

Background:

Thulium-doped lasers (Tm:LuAG) are crucial for mid-infrared applications.
Achieving high power, short pulses, and high repetition rates simultaneously remains a challenge.

Purpose of the Study:

To develop a high-performance Tm:LuAG laser oscillator.
To investigate the impact of cavity-dumped electro-optic Q-switching on laser output characteristics.

Main Methods:

Utilized a cavity-dumped electro-optic Q-switching technique.
Employed a Tm:LuAG crystal as the gain medium.
Investigated varying repetition rates (60-100 kHz) and intracavity photon accumulation times (500-1000 ns).

Main Results:

Achieved constant 3 ns pulse durations across repetition rates from 60 to 100 kHz.

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Obtained an average power of 1.22 W and a peak power of 4.1 kW at 100 kHz.

Reported a slope efficiency of 6% and a beam quality factor (M²~1.4).

Conclusions:

The cavity-dumped Tm:LuAG oscillator demonstrates a unique combination of high power, short pulse duration, and high repetition rate.
The findings offer a promising solution for applications requiring efficient mid-infrared laser sources.