Title :
Generation and detection of 160 MHz acoustic waves using a TEA CO/sub 2/ laser irradiated polymer film combination
Author :
Dyer, P.E. ; Sidhu, J. ; Tait, B.L.
Author_Institution :
Dept. of Appl. Phys., Hull Univ., UK
Abstract :
High-frequency ( approximately 160 MHz) large-amplitude acoustic waves have been generated by irradiating a thin polymer film with a spontaneously mode-locked TEA (transversely-excited atmosphere) CO/sub 2/ laser and detected using a wide-bandwidth piezoelectric polymer transducer. This approach uses a simple and commonly available infrared laser, does not require special coatings to be deposited on the acoustic generating surface, and is inherently simple in its design and operation.<>
Keywords :
laser beam applications; photoacoustic effect; polymer films; ultrasonic propagation; 160 MHz; CO/sub 2/ laser; infrared laser; large-amplitude acoustic waves; photoacoustic effect; spontaneously mode-locked TEA laser; thin polymer film; transversely-excited atmosphere; Acoustic signal detection; Acoustic transducers; Acoustic waves; Atmosphere; Coatings; Gas detectors; Laser mode locking; Piezoelectric transducers; Polymer films; Surface emitting lasers;
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
