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23 March 1988 Optical Fiber Stress Wave Sensor
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Proceedings Volume 0838, Fiber Optic and Laser Sensors V; (1988)
Event: Cambridge Symposium on Fiber Optics and Integrated Optoelectronics, 1987, Cambridge, MA, United States
The attenuation and dispersion of intense stress waves in solids can be measured by fiber optic techniques. This paper describes an in-situ optical fiber strain sensor that can be used to measure transient subsurface strains with a bandwidth of 1 GHz. The sensor consist of a length of polarization maintaining fiber which is illuminated by a coherent polarized light source. The presence of a stress wave is detected and measured by monitoring the state of polarization and phase of the transmitted light, in a manner closely analogous to a classical photoelastic diagnostic-except on a sub-miniature scale. By using two wave-lengths, both components of transverse stress in an incident disturbance can be determined. Experimental results are shown and the sensor principles and measurement techniques are discussed.
© (1988) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Gerald Meltz and James R. Dunphy "Optical Fiber Stress Wave Sensor", Proc. SPIE 0838, Fiber Optic and Laser Sensors V, (23 March 1988);


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