Fujii Takashi, Goto Naohiko, Miki Megumu, Nayuki Takuya, Nemoto Koshichi
Central Research Institute of Electric Power Industry, Kanagawa, Japan.
Opt Lett. 2006 Dec 1;31(23):3456-8. doi: 10.1364/ol.31.003456.
We experimentally demonstrated remote sensing of the constituents of microparticles in air by combining laser-induced breakdown spectroscopy (LIBS) and lidar, using femtosecond terawatt laser pulses. Laser pulses of 70 fs duration and 130 mJ energy generated filaments when focused at a focal length of 20 m and the pulses irradiated artificial saltwater aerosols in air at a 10 Hz pulse repetition rate. Na fluorescence was observed remotely at a distance of 16 m using a 318 mm diameter Newtonian telescope, a spectrometer, and an intensified CCD camera. These results show the possibility of remote measurement of the constituents of atmospheric particles, such as aerosols, clouds, and toxic materials, by LIBS-lidar using femtosecond terawatt laser pulses.
我们通过结合激光诱导击穿光谱技术（LIBS）和激光雷达，并使用飞秒太瓦激光脉冲，通过实验证明了对空气中微粒成分的遥感探测。持续时间为70飞秒、能量为130毫焦的激光脉冲在聚焦于20米焦距时产生细丝，并且这些脉冲以10赫兹的脉冲重复率照射空气中的人造盐水气溶胶。使用直径为318毫米的牛顿望远镜、光谱仪和增强型电荷耦合器件相机在16米的距离处远程观测到了钠荧光。这些结果表明，利用飞秒太瓦激光脉冲的LIBS激光雷达对大气颗粒成分（如气溶胶、云和气态有害物质）进行远程测量是可能的。
