研究目的
Investigating the performance of few-layer Platinum diselenide (PtSe2) as a saturable absorber (SA) in a passively Q-switched Nd:YVO4 laser at 1.3 μm.
研究成果
The study successfully demonstrated the use of PtSe2 as a saturable absorber in a passively Q-switched Nd:YVO4 laser at 1.3 μm, achieving high stability and performance. The results suggest that PtSe2 is a promising material for pulsed lasers in this spectral range, with potential for further optimization and application in Q-switched mode-lock and mode-locked lasers.
研究不足
The study is limited to the 1.3 μm spectral range and does not explore the performance of PtSe2 SA in other wavelengths. The fabrication process of PtSe2 SA, while effective, may require optimization for broader applications.
1：Experimental Design and Method Selection:
The study utilized a passively Q-switched Nd:YVO4 laser setup with PtSe2 as the SA. The nonlinear saturable absorption properties of PtSe2 were measured using a homemade 1342 nm nanosecond laser.
2：Sample Selection and Data Sources:
Few-layer PtSe2 SA was synthesized on a quartz substrate using the chemical vapor deposition (CVD) technique.
3：List of Experimental Equipment and Materials:
A fiber-coupled laser diode emitting at 808 nm, a Nd:YVO4 crystal, and a PtSe2 SA were used. The setup included an input mirror (IM) M1 and an output coupler (OC) M
4：Experimental Procedures and Operational Workflow:
The pump beam was focused into the laser gain medium, and the PtSe2 SA was inserted into the cavity to adjust the cavity loss. The output power, pulse width, and repetition rate were recorded.
5：Data Analysis Methods:
The nonlinear optical absorption was analyzed using a simple saturation mode to calculate the modulation depth and saturation intensity.
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