Ultrasonic sensors and generators based on fiber-optic systems are described. It is shown that intrinsic fiber optic Fabry-Perot ultrasound sensors that are embedded in a structure can be stabilized by actively tuning the laser frequency. The need for this method of stabilization is demonstrated by detecting piezoelectric transducer-generated ultrasonic pulses in the presence of low frequency dynamic strains that are intentionally induced to cause sensor drift. The actively stabilized embedded fiber optic Fabry-Perot sensor is also shown to have sufficient sensitivity to detect ultrasound that is generated in the interior of a structure by means of a high-power optical fiber that pipes energy from a pulsed laser to an embedded generator of ultrasound.
Embedded fiber optic ultrasonic sensors and generators
Pacific Northwest Fiber Optic Sensor Workshop ; 1995 ; Troutdale,OR,United States
Proc. SPIE ; 2574
1995-04-20
Conference paper
Electronic Resource
English
British Library Conference Proceedings | 1994
|Embedded fiber-optic sensors in large structures
SPIE | 1991
|Embedded Fiber Optic Sensors for High Strain Composite Components
British Library Conference Proceedings | 2013
|