研究目的
Investigating the use of Sb2Te3 as a saturable absorber for passively Q-switched solid state pulsed lasers operating around 2.0 mm.
研究成果
The hydrothermally synthesized Sb2Te3 nanosheet is a promising saturable absorber for near-infrared pulsed lasers, capable of producing high-performance pulses with significant energy, power, and repetition rates.
研究不足
The study was limited by the thermal loading effects at higher absorbed pump powers, which could affect the stability of the pulse trains.
1：Experimental Design and Method Selection:
A compact plane–plane cavity was chosen for the experiment. An a-cut Tm:YAP crystal was used as the gain medium, cooled with constant 283 K water. The setup was end-pumped with a fiber-coupled LD centered at 798 nm.
2：Sample Selection and Data Sources:
Sb2Te3 nanosheets were prepared using a facile hydrothermal method.
3：List of Experimental Equipment and Materials:
Tm:YAP crystal, fiber-coupled LD, coupling lens, input and output mirrors, ST saturable absorber.
4：Experimental Procedures and Operational Workflow:
The ST saturable absorber was spun onto the output mirror. The absorbed pump power was varied to observe Q-switching effects.
5：Data Analysis Methods:
The nonlinear absorption characteristic of ST was explored using a home-made acousto-optic Q-switched laser. The laser power was detected before and after the material.
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Tm:YAP crystal
Gain medium for the laser setup
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fiber-coupled LD
Pump source centered at 798 nm
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coupling lens
Focuses the pump light into the gain medium
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input mirror
Coated for antireflection at around 798 nm and high-reflection at around 1980 nm
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output coupler
Plane mirror with 3.5% transmittance at 1980 nm
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ST saturable absorber
Used for Q-switching the laser
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