Abstract：
:We present a method to generate sub-microsecond quasi-unipolar pressure pulses. Our approach is based on the laser irradiation of a thin copper wire submerged in water. The acoustic waveforms were recorded using two different, well characterized, wideband detection techniques: piezoelectric and optical interferometry. The results show that the irradiated target behaves as an omnidirectional source. Moreover, the peak pulse pressure linearly depends on the laser fluence and the source size. From the results, we propose an empirical equation for the spatial and temporal profile of the pressure pulse. The method has several advantages: ease of implementation, high repeatability, wide ultrasonic bandwidth and quasi-unipolar time profile. These features lead to potential applications of this acoustic source in ultrasonic characterization such as transducer systems, materials or passive devices.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
González MG,Riobó LM,Ciocci Brazzano L,Veiras FE,Sorichetti PA,Santiago GDdoi
10.1016/j.ultras.2019.05.002subject
Has Abstractpub_date
2019-09-01 00:00:00pages
15-19eissn
0041-624Xissn
1874-9968pii
S0041-624X(18)30431-1journal_volume
98pub_type
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