Ultrasonic Sensing From 100 kHz to 50 MHz Using Single Mode Optical Fiber

R. P. De Paula; J. H. Cole; J. A. Bucaro

doi:10.1117/12.935806

19 September 1983 Ultrasonic Sensing From 100 kHz to 50 MHz Using Single Mode Optical Fiber

R. P. De Paula, J. H. Cole, J. A. Bucaro

Proceedings Volume 0412, Fiber Optic and Laser Sensors I; (1983) https://doi.org/10.1117/12.935806
Event: 1983 Technical Symposium East, 1983, Arlington, United States

Abstract

Recently we have proposed and demonstrated two broadband single mode fiber optic sensor systems for detection of ultrasonic waves propagating in fluids. A review of such systems and their theoretical analysis is presented here. One such system is based on polarization modulation and only requires the use of a single fiber in a very simple configuration. This system has a frequency response from 0.7 MHz to 50 MHz, and a flat response between 11 MHz and 25 MHz. The other system is based on phase modulation, in the form of a two fiber Mach-Zehnder interferometer. The ultrasonic wave is detected through the pressure induced changes in the interference between the two optical beams propagating in the "ref-erence" and "sensing" fiber, i.e., the two arms of the interferometer. This system has a frequency response from 50 kHz to 50 MHz, with a flat response between 50 kHz and 1 MHz.

Citation Download Citation

R. P. De Paula, J. H. Cole, and J. A. Bucaro "Ultrasonic Sensing From 100 kHz to 50 MHz Using Single Mode Optical Fiber", Proc. SPIE 0412, Fiber Optic and Laser Sensors I, (19 September 1983); https://doi.org/10.1117/12.935806

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