Title :
Photoacoustic generation: all-optical fibre transducers
Author :
Biagi, E. ; Fontani, S. ; Francini, F. ; Masotti, L. ; Pieraccini, M.
Author_Institution :
Dept. of Electron. Eng., Florence Univ., Italy
Abstract :
Innovative photoacoustic transducers for ultrasonic NDE, smart structure, and clinical diagnosis are proposed. The working principle is based on thermal conversion of laser pulses into a metallic film evaporated directly onto the tip of an optical fibre, or, alternatively, on the extrados of an uncladded and U-bent fibre. Unique features of the proposed transducers are: very high miniaturization and potential easy embedding in smart structure. Additional advantages are: good conversion efficiency, high acoustic power in high frequency range, large bandwidth, and spectral purity of the ultrasonic signal
Keywords :
acoustic transducers; optical fibres; photoacoustic effect; ultrasonic transducers; all-optical fibre transducer; clinical diagnosis; evaporated metallic film; laser pulse; miniaturization; photoacoustic generation; smart structure; thermal conversion; ultrasonic NDE; Acoustic pulses; Acoustic transducers; Clinical diagnosis; Fiber lasers; Frequency conversion; Intelligent structures; Optical fibers; Optical films; Optical pulses; Ultrasonic transducers;
Conference_Titel :
Ultrasonics Symposium, 1996. Proceedings., 1996 IEEE
Conference_Location :
San Antonio, TX
Print_ISBN :
0-7803-3615-1
DOI :
10.1109/ULTSYM.1996.584143
