研究目的
Investigating the nonlinear optical properties and application of chirality-selected single-wall carbon nanotubes (SWCNTs) as saturable absorbers in passively Q-switched lasers.
研究成果
The study successfully synthesized SWCNTs with specific chirality and demonstrated their application as saturable absorbers in passively Q-switched lasers, achieving a minimum pulse duration of 115 ns.
研究不足
The optical scattering induced losses of the un-uniform SA surface and the vulnerability of SWCNTs with chirality (6, 5) to the pump wavelength may affect the pulse modulation stability.
1：Experimental Design and Method Selection:
The study employed the density gradient ultracentrifugation (DGU) method for chirality selection of SWCNTs and an open-aperture Z-scan setup for investigating nonlinear optical properties.
2：Sample Selection and Data Sources:
SWCNTs produced by a Co-MoCAT catalytic CVD method were used.
3：List of Experimental Equipment and Materials:
A Q-switched laser at 1064 nm, PM320E dual-channel energy meter, and a homemade fast PIN photodiode detector were used.
4：Experimental Procedures and Operational Workflow:
The nonlinear absorption properties were measured under different pump levels, and the SWCNTs-SA was employed in a passively Q-switched Nd:GdVO4 laser setup.
5：Data Analysis Methods:
The nonlinear optical performance was analyzed based on the Z-scan measurement results.
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