The possibility of precise measurement of the group velocity of ultrasonic waves of submicrometer-sized objects using laser excitation of acoustic pulses

A.A. Karabutov1, 2, N.P. Muravskaya1, A.V. Strel’tcov1, F.I. Khrapov1

1FSUE “VNIIFTRI”, Mendeleevo, Moscow region, Russia;
2FSBSI Federal Research Center “Prokhorov General Physics Institute of the Russian Academy of Sciences”, Moscow, Russia;
aak@optoacoustic.ru,
npv@vniiftri.ru,
avs@vniiftri.ru,
hrapov@vniiftri.ru

Al’manac of Modern Metrology № 3 (43) 2025, pages 21–29

The page of the article in Russian

Abstract. The possibility of laser ultrasonic measurement of ultrasonic group velocity of millimeter size samples is demonstrated. One-side access to the object surface with thin liquid layer is realized. Several solid samples — glass, metal, ceramic — with the thick­ness of 3–10 mm were tested. It was stated, that laser excited submicrosecond ultrasonic pulses and extra wide-band piezoelectric detection provide relative 0.1 % accuracy of ultra­sonic wave velocity measurement. The technology provides precise measurement over wide range of ultrasonic wave velocity.

Keywords: laser ultrasonics, ultrasonic waves, group velocity

Full texts of articles are available only in Russian in printed issues of the magazine.

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