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Fiber Tip Based Sensor System for Measurements of Pressure Gradient, Air Particle Velocity and Acoustic Intensity

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.

Inventor(s)

Balakumar Balachandran
Moustafa Al-Bassyiouni

Date Issued 

05/29/2007

Patent No. 

7,224,465