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作 者:王德田[1] 李泽仁[1] 吴建荣[2] 刘寿先[1] 刘俊[1] 蒙建华[1] 彭其先[1] 陈光华[1] 刘乔[1]
机构地区:[1]中国工程物理研究院流体物理研究所,四川绵阳621900 [2]中国科学技术大学,安徽合肥230027
出 处:《爆炸与冲击》2009年第1期105-108,共4页Explosion and Shock Waves
基 金:中国工程物理研究院预研基金项目(20050434)
摘 要:利用光学多普勒效应和外差方法搭建了一台光纤位移干涉仪。装置采用光通信行业中已经发展成熟的器件,主要由带尾纤的半导体激光器、三端口环形器、光纤探头、宽带探测器以及宽带高采样率示波器等构成。整个装置结构简单,价格便宜,采用了信号光和参考光同轴结构,实现了任意反射面的速度测量,克服了偏振模式色散的影响,能够实现长量程测量,量程达到20 mm。利用该装置进行了爆轰加载下飞片速度测量,测量最高速度达到1300 m/s,工作距离达到20 mm,同时利用VISAR对飞片速度进行了对比测量,结果表明用两种不同方法所测得的速度曲线吻合很好。An optical-fiber displacement interferometer was proposed on the basis of the optical Doppler effects and heterodyne technique. The proposed interferometer was assembled by using the components well developed in the telecommunication industry, which consisting of a fiber-pigtailed semiconductor laser, a three-port optical circulator, a fiber probe, a wideband detector, a high-sampling-rate broadband oscilloscope, and so on. The coaxial configuration for the signal light and reference light is adopted so that the proposed interferometer can measure velocities of any reflecting surface and overcomes the effects of polarization-mode dispersion, and its work distance is up to 20 mm. The velocities of the explosively-driven metal plate were measured by the proposed interferometer and compared with those measured by the velocity interferometer system for any reflector. Measured results show the velocities by these two methods are accordant with each other.
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