Influence of the focusing f number on the heating regime transition in laser absorption waves
Influence of the focusing f number on the heating regime transition in laser absorption waves
复制标题
聚焦f数对激光吸收波加热状态转变的影响
DOI：
10.1063/1.1513869
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发表时间：
2002
影响因子：
3.2
通讯作者：
Y. Arakawa
中科院分区：
文献类型：
--
作者：
K. Mori;K. Komurasaki;Y. Arakawa
利用横向激励的大气压CO2脉冲激光器在大气中产生激光等离子体，研究了聚焦f数（λ焦距/激光束直径）对激光吸收波加热区转变阈值的影响。结果表明，当激光能量为10 J/脉冲时，f=1.1光学器件的跃迁阈值为2.6±0.4 MW/cm 2，f=2.2光学器件的跃迁阈值为3.7±0.4 MW/cm 2。在激光支持的爆轰制度的前沿面积和吸收层厚度的差异进行了解释。
Laser plasma was produced in air atmosphere using a transversely excited atmospheric CO2 pulse laser; the influence of the focusing f number (≡ focal length/laser beam diameter) on the threshold of a heating regime transition in laser absorption waves was then investigated. As a result, when the laser energy was 10 J/pulse, the transition threshold was 2.6±0.4 MW/cm2 with f=1.1 optics and 3.7±0.4 MW/cm2 with f=2.2. The difference was explained in terms of the front area and absorption layer thickness in the laser supported detonation regime.