Measurement of speed and attenuation of longitudinal elastic waves in   optical fibers

Brad M. Beadle; Jacek Jarzynski

doi:10.1117/1.1403449

1 October 2001 Measurement of speed and attenuation of longitudinal elastic waves in optical fibers

Brad M. Beadle, Jacek Jarzynski

Optical Engineering, Vol. 40, Issue 10, (October 2001). https://doi.org/10.1117/1.1403449

A longitudinal elastic pulse is generated in a segment of optical fiber. A laser Doppler vibrometer is used to make noncontact measurements of the axial surface velocity at several locations along the optical fiber segment. The measured temporal phase shift and amplitude attenuation of the elastic pulse as it propagates between measurement locations are used to deduce the elastic wave speed and mechanical loss factor for the optical fiber. The knowledge of these properties is important to the design of optical sensors for dynamic phenomena such as vibrations and acoustic pressure. One potential application of the method is nondestructive testing for delamination between an optical fiber's glass cladding and plastic jacket.

©(2001) Society of Photo-Optical Instrumentation Engineers (SPIE)

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Brad M. Beadle and Jacek Jarzynski "Measurement of speed and attenuation of longitudinal elastic waves in optical fibers," Optical Engineering 40(10), (1 October 2001). https://doi.org/10.1117/1.1403449

Published: 1 October 2001

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