研究目的
To investigate the femtosecond laser-induced ablation processes in As2S3 glass and the fabrication of diffraction gratings with high diffraction efficiency.
研究成果
The study successfully investigated the femtosecond laser-induced ablation processes in As2S3 glass and fabricated diffraction gratings with high diffraction efficiency. The findings contribute to the understanding of laser-material interactions and the optimization of laser processes.
研究不足
The study focuses on As2S3 chalcogenide glasses and may not be directly applicable to other materials. The mechanisms of surface morphology evolution are not perfectly explained.
1：Experimental Design and Method Selection:
Pump-probing technology was used to investigate the femtosecond laser-induced ablation processes in As2S3 glass. The setup included a Ti Sapphire laser for ablation and a He-Ne laser for probing.
2：Sample Selection and Data Sources:
As2S3 chalcogenide glasses were used as targets for laser ablation.
3：List of Experimental Equipment and Materials:
Ti Sapphire laser pulses of 800 nm wavelength and 150 fs temporal width, He-Ne continuous laser for probing, fast photodiode coupled to an oscilloscope.
4：Experimental Procedures and Operational Workflow:
The laser beam was focused onto the As2S3 targets, and the reflection probing system was used to measure the intensity of the reflection probe signal.
5：Data Analysis Methods:
The relationship between surface morphologies and laser fluences was studied to fabricate long-period grating structures.
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