Energy conversion in a glass-laser-induced blast wave in air
Energy conversion in a glass-laser-induced blast wave in air
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DOI：
10.1063/1.3525561
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发表时间：
2010-12
影响因子：
3.2
通讯作者：
Bin Wang;K. Komurasaki;Toshikazu Yamaguchi;K. Shimamura;Y. Arakawa
中科院分区：
文献类型：
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作者：
Bin Wang;K. Komurasaki;Toshikazu Yamaguchi;K. Shimamura;Y. Arakawa
利用波长为1053 nm、激光能量为2.0J/脉冲、脉宽为33 ns(半高全宽)的调Q掺钕玻璃激光器，研究了近红外固体激光诱导的冲击波。半影法半自发射可视化揭示了激光爆震波和冲击波。使用成对的光电探测器和能量计测量激光输出和通过波的透过率。结果表明，在近红外区有体积吸收，这主要归因于短波长的低反韧致辐射吸收系数。在Ei=1.0J/脉冲时，部分激光能量转化为冲击波能量：59%，与CO2激光诱导的冲击波能量相近。
Near-infrared solid laser-induced blast waves were investigated using a Q-switched Nd:glass laser oscillating at 1053 nm wavelength, up to 2.0 J/pulse laser energy Ei, and 33 ns pulse duration (full width at half maximum). Half-shadowgraph half-self-emission visualization elucidated laser detonation waves and blast waves. Laser output and transmission through the waves were measured using pairs of a photodetectors and energy meters. Results show volumetric absorption in this near-infrared region, which is mainly attributable to low inverse-Bremsstrahlung absorption coefficients at short wavelengths. Some input laser energy was converted into blast wave energy: 59% at Ei=1.0 J/pulse, which approximates that of CO2 laser-induced blast waves.