研究目的
Investigating the influence of pulse repetition rate on heat accumulation and temperature changes in glass during UV laser microdrilling.
研究成果
The pulse repetition rate significantly affects heat accumulation and temperature in the illuminated area, influencing the ablation threshold for glass machining. Higher repetition rates lower the energy required for melting and removal.
研究不足
The study did not consider high-temperature effects like latent heat, thermal radiation, and temperature dependence of material properties, limiting the discussion to temperatures up to about 1000K.
1：Experimental Design and Method Selection:
Utilized Nd:YVO4 laser's 4th harmonic for UV laser pulses, focusing with a lens after circular polarization.
2：Sample Selection and Data Sources:
Used glass samples, specifically Sharp Cut Filter (SCF-50S-38L) for its UV absorption properties.
3：List of Experimental Equipment and Materials:
Nd:YVO4 laser, λ/4 wavelength plate, focusing lens, Sharp Cut Filter.
4：Experimental Procedures and Operational Workflow:
Varied pulse repetition rates from 1 kHz to 20 kHz, observed changes in glass surface post-irradiation.
5：Data Analysis Methods:
Numerical calculation of temperature distribution using differential equations in cylindrical coordinates.
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