A novel all-fiber high velocity interferometer for any reflector

作者：Hong Guang Wei^*; Jia Bo; Wang Xiang

来源：Microwave and Optical Technology Letters, 2007, 49(8): 2032-2035.

DOI：10.1002/mop.22606

• all-fiber velocity interferometer system for any reflector (AFVISAR)
• fringe loss
• 3 X 3 fiber coupler
• quasi-direct current (QDC)

A novel all-fiber high velocity interferometer system for any reflector (AFHVISAR) is proposed and demonstrated. The system mainly consists of two 3 x 3 SM fiber couplers. A quasi-direct current (QDC) signal directly from the moving surface is obtained and used to offset the QDC component in the interfering signals for more precise phase demodulation. The use of the diffuse surface solves the fringe loss problem induced by the nonparallel movements of the surface. The experiment with a one-stage light gas gun shows that the AFHVISAR can successfully achieve the surface velocity profile of LY12 aluminum specimen.

• 出版日期2007-8
• 单位中国工程物理研究院流体物理研究所; 复旦大学