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摘要: 介绍了全光纤任意反射面速度干涉仪(F-VISAR)的原理,并在动高压条件下进行了初步应用。结果表明,在Hopkinson杆实验中冲击速度较低,全光纤VISAR系统工作性能很好;在一级轻气炮实验中冲击速度较高,尚存在一些技术问题,并对此进行了分析与讨论。Abstract: A new kind of VISAR called all-fiber white light velocity interfermetic system for any reflector is introduced. The system was used to measure the free surface velocities of samples under dynamic loading. Experimental results show that the system works well for low velocity (10 m/s). It seems that the system needs to be improved for higher velocity.
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Key words:
- optical fiber /
- VISAR /
- shock dynamic
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Barker L M, Hollenbach R E. Laser Interferometer for Measure High Velocities of Any Reflecting [J]. J Appl Phys, 1972, 43(11): 4669-4675. Hemsing W H. Velocity Sensing Interferometer (VISAR) Modification [J]. Rev Sci Instrum, 1979, 50(1): 73-78. 胡力, 贾波, 叶昆珍, 等. 全光纤白光任意反射面速度干涉系统 [J]. 光子学报, 2000, 6: 814-820. Levin L, Tzach D, Shamir J. Fiber Optic Velocity Interferometer with Very Short Coherence Length Light Source [J]. Rev Sci Instrum, 1996, 67(4): 1434-1437. Erskine D J, Holmes N L. White-Light Velocimetry [J]. Nature, 1995, 377: 317-320.
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