We have developed a ballistic shock sensor based on interferometric velocimetry. The requirements of the sensor are that it should measure the motion of an impacted armored plate with velocities up to 10 m/s, frequencies up to 100 kHz, and displacements not exceeding about 3 mm. Our fiber optic system uses a 3 × 3 fiber directional coupler and digital demodulation for passive stabilization of the interferometer. In this paper, we describe the digital signal processing for phase drift compensation and automatic calibration of the system. Simulation results will be presented.

Date Published: 10 September 2009
PDF: 9 pages
Proc. SPIE 7432, Optical Inspection and Metrology for Non-Optics Industries, 74320K (10 September 2009); doi: 10.1117/12.828498

Published in SPIE Proceedings Vol. 7432:
Optical Inspection and Metrology for Non-Optics Industries
Peisen S. Huang; Toru Yoshizawa; Kevin G. Harding, Editor(s)