Ultrasonic pressure sensor and method of operating the same

Measuring and testing – Fluid pressure gauge – Vibration type

Reexamination Certificate

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C073S655000, C356S502000

Reexamination Certificate

active

07810395

ABSTRACT:
An ultrasonic pressure sensor and a method of detecting ultrasonic pressure. In one embodiment, the ultrasonic pressure sensor includes: (1) an interferometer having a reference arm and a signal arm that includes a probing fiber, the probing fiber having a reflective coating at a distal end thereof and configured to couple to ultrasonic waves proximate the distal end, the interferometer configured to receive laser light and produce two output beams based on the ultrasonic waves and (2) a photodetector coupled to the interferometer and configured to generate electronic signals based on the two output beams.

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PCT International Search Report and Written Opinion of the International Searching Authority.
Paul C. Beard, et al., “Characterization of a Polymer Film Optical Fiber Hydrophone for Use in the Range 1 to 20 MHz: A Comparison with PVDF Needle and Membrane Hydrophones” IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control, vol. 47, No. 1, Jan. 2000, pp. 256-264.

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