激光诱导薄膜等离子体点燃时间及其影响因素
发布时间：2018-09-08 06:54
【摘要】：将波长为1064nm的纳秒Nd∶YAG脉冲激光聚焦在单层Al膜上,诱导其产生等离子体闪光,模拟计算了等离子体闪光的点燃时间(t_m),分别得到了t_m与激光波长、入射激光能量、聚焦光斑半径、脉宽等激光作用参数的关系曲线,研究分析了薄膜材料、薄膜表面杂质和缺陷对t_m大小的影响。结果表明,激光聚焦光斑和脉宽越大,t_m就越大;激光波长和入射激光能量越大,t_m越小;薄膜材料电离能越小,t_m越小;薄膜表面存在杂质和缺陷时,t_m变小。这些结果对关于激光维持燃烧波和爆轰波的产生机制的研究提供了一定的参考。
[Abstract]:The nanosecond Nd:YAG pulse laser with wavelength of 1064nm is focused on the single layer Al film to induce the plasma flash. The igniting time of the plasma flash is simulated and calculated. The incident laser energy and the wavelength of the laser are obtained, respectively. The relation curves of laser action parameters such as focusing spot radius and pulse width are studied. The effects of film materials, surface impurities and defects on the size of t _ s _ m are studied. The results show that the bigger the laser focusing spot and pulse width are, the larger the laser wavelength and incident laser energy are, the smaller the laser wavelength and incident laser energy, the smaller the ionization energy of thin film material is, and the smaller the structure of the thin film surface is when there are impurities and defects on the surface of the film. These results provide some references for the study of the mechanism of laser sustained combustion and detonation waves.
【作者单位】： 西安工业大学光电工程学院;
【基金】：国家自然科学基金(61378050) 科技部国际科技合作项目(2013DFR70620)
【分类号】：O484;O53
，
本文编号：2229708
[Abstract]:The nanosecond Nd:YAG pulse laser with wavelength of 1064nm is focused on the single layer Al film to induce the plasma flash. The igniting time of the plasma flash is simulated and calculated. The incident laser energy and the wavelength of the laser are obtained, respectively. The relation curves of laser action parameters such as focusing spot radius and pulse width are studied. The effects of film materials, surface impurities and defects on the size of t _ s _ m are studied. The results show that the bigger the laser focusing spot and pulse width are, the larger the laser wavelength and incident laser energy are, the smaller the laser wavelength and incident laser energy, the smaller the ionization energy of thin film material is, and the smaller the structure of the thin film surface is when there are impurities and defects on the surface of the film. These results provide some references for the study of the mechanism of laser sustained combustion and detonation waves.
【作者单位】： 西安工业大学光电工程学院;
【基金】：国家自然科学基金(61378050) 科技部国际科技合作项目(2013DFR70620)
【分类号】：O484;O53
，
本文编号：2229708
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