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.


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    Title :

    Embedded fiber optic ultrasonic sensors and generators


    Contributors:

    Conference:

    Pacific Northwest Fiber Optic Sensor Workshop ; 1995 ; Troutdale,OR,United States


    Published in:

    Publication date :

    1995-04-20





    Type of media :

    Conference paper


    Type of material :

    Electronic Resource


    Language :

    English



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