PatentDOI
Fiber tip based sensor system for measurements of pressure gradient, air particle velocity and acoustic intensity
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TLDR
In this paper, a combined pressure gradient sensor, air particle velocity sensor, as well as acoustic intensity sensor is built based on the fiber tip based Fabry-Perot sensors, where each sensor includes a diaphragm as the transducer.Abstract:
A fiber optic sensor system for pressure measurements where the design permits multiplexity on the input side of the system and the optical part of the system, which has a sensor Fabry-Perot interferometer and a read-out interferometer, is based on low coherence fiber-optic interferometry techniques. This permits a high dynamic range and low sensitivity to the wavelength fluctuation of the light source as well as to the optical intensity fluctuations. The system includes fiber tip based Fabry-Perot sensors, where each sensor includes a diaphragm as the transducer. A combined pressure gradient sensor, air particle velocity sensor, as well as acoustic intensity sensor is built based on the fiber tip based Fabry-Perot sensors.read more
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References
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Journal ArticleDOI
Fiber‐optic hydrophone
TL;DR: In this article, the phase modulation of an optical beam in a submerged optical fiber coil by sound waves propagating in a fluid is used to produce a sensitive acoustic detector, and the results indicate that the sensitivity of this technique compares well with that of the best available hydrophone.
Journal ArticleDOI
Fiber‐optic detection of sound
TL;DR: In this paper, a single-mode optical fiber was used to pass a laser beam through a tank in which an approximately plane acoustic wave was produced, and the response of an optical fiber in water to low-frequency acoustic waves was investigated experimentally and compared with analytical results.
Patent
Fabry-Perot optical sensing device for measuring a physical parameter
Claude Belleville,Gaetan Duplain +1 more
TL;DR: In this article, the optical sensing device and the method thereof are for measuring a physical parameter, which is to be connected to a light source which generates a multiple frequency light signal having predetermined spectral characteristics.
Journal ArticleDOI
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
TL;DR: The ability to achieve high acoustic sensitivity with small element sizes and to repeatably fabricate rugged sensor downleads using polymer deposition techniques suggests that this type of hydrophone can provide a practical alternative to piezoelectric hydrophone technology.
Patent
Fiber optic fiber Fabry-Perot interferometer diaphragm sensor and method of measurement
Henry F. Taylor,Ta-Wei Kao,James H. Gardner,William N. Gibler,Robert A. Atkins,Chung E. Lee,Victor P. Swenson,Matthew O. Spears,Robert X. Perez +8 more
TL;DR: In this paper, a fiber optic fiber Fabry-Perot interferometer diaphragm sensor and method of measurement is provided, which includes a base ( 54 a, 54 b, 54 c ), a diaphram ( 52 a, 52 b, 52 c ), coupled under tension between the base and the diaphrogram.