Optical Fiber Stress Wave Sensor

Gerald Meltz; James R. Dunphy

doi:10.1117/12.942491

23 March 1988 Optical Fiber Stress Wave Sensor

Gerald Meltz, James R. Dunphy

Proceedings Volume 0838, Fiber Optic and Laser Sensors V; (1988) https://doi.org/10.1117/12.942491
Event: Cambridge Symposium on Fiber Optics and Integrated Optoelectronics, 1987, Cambridge, MA, United States

Abstract

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.

Citation Download Citation

Gerald Meltz and James R. Dunphy "Optical Fiber Stress Wave Sensor", Proc. SPIE 0838, Fiber Optic and Laser Sensors V, (23 March 1988); https://doi.org/10.1117/12.942491

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