【摘要】：將波長為1064nm的納秒Nd∶YAG脈沖激光聚焦在單層Al膜上,誘導(dǎo)其產(chǎn)生等離子體閃光,模擬計(jì)算了等離子體閃光的點(diǎn)燃時(shí)間(t_m),分別得到了t_m與激光波長、入射激光能量、聚焦光斑半徑、脈寬等激光作用參數(shù)的關(guān)系曲線,研究分析了薄膜材料、薄膜表面雜質(zhì)和缺陷對t_m大小的影響。結(jié)果表明,激光聚焦光斑和脈寬越大,t_m就越大;激光波長和入射激光能量越大,t_m越小;薄膜材料電離能越小,t_m越小;薄膜表面存在雜質(zhì)和缺陷時(shí),t_m變小。這些結(jié)果對關(guān)于激光維持燃燒波和爆轟波的產(chǎn)生機(jī)制的研究提供了一定的參考。
[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.
【作者單位】： 西安工業(yè)大學(xué)光電工程學(xué)院;
【基金】：國家自然科學(xué)基金(61378050) 科技部國際科技合作項(xiàng)目(2013DFR70620)
【分類號(hào)】：O484;O53
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本文編號(hào)：2229708