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Proceedings Paper

Fiberized laser ultrasonic source for process monitoring and biomedical applications
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Paper Abstract

A new design for a fiberized laser ultrasonic source for process monitoring and bio-medical applications is proposed. The laser ultrasonic source consists of a pulsed laser, a fiber-optic cable, and a generation head. The generation head is a miniature hermetically sealed chamber, which can be embedded into solid structures or immersed in liquid media. The face of the chamber acts as a target for the laser irradiation. Bulk ultrasonic waves generated inside of the target are transmitted into the surrounding liquid media or solid structure. It is shown that ultrasonic pulses of 1 microsecond(s) to 30 ns duration can be generated. Sources with different radiation patterns with respect to the optical axis of the fiber, such as normal, angular, and focused, have been devised. An example use of these sources combined with a fiber optic ultrasonic sensor for inspection of small tubes is presented.

Paper Details

Date Published: 31 August 2000
PDF: 8 pages
Proc. SPIE 4074, Applications of Optical Fiber Sensors, (31 August 2000); doi: 10.1117/12.397872
Show Author Affiliations
Pavel A. Fomitchov, Northwestern Univ. (United States)
Alexei K. Kromine, Northwestern Univ. (United States)
Sridhar Krishnaswamy, Northwestern Univ. (United States)
Jan D. Achenbach, Northwestern Univ. (United States)

Published in SPIE Proceedings Vol. 4074:
Applications of Optical Fiber Sensors
Alan J. Rogers, Editor(s)

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