Localized measurement of a sub-nanosecond shockwave pressure rise time

Petelin, Jaka (author), Lokar, Žiga (author), Horvat, Darja (author), Petkovšek, Rok (author)

In a growing number of applications fast and localized pressure measurement in aqueous media is desired. To perform such measurements a custom made single-mode fiber optic probe hydrophone (FOPH) was designed and used to measure the pressure pulse generated by laser induced breakdown in water. The sensor enabled sub-nanosecond pressure rise time measurement. Both the rise time and the duration of the shockwave were found to be shorter in the direction perpendicular to the breakdown generating laser beam, compared to the shockwave observed in the parallel direction. Simultaneous high-framerate imaging was used to qualitatively validate the novel hydrophone data and to observe the shockwave evolution. The measurements were performed also on pressure pulses emitted during generation of miniature (150 [micro]m diameter) laser-induced bubbles at very small distances (down to 40 [micro]m), further demonstrating the capabilities of the small-size sensor and the ability to measure locally. The results improve understanding of laser induced breakdown shockwave characteristics dependence on laser pulse energy and duration.

• Language: English
• Keywords: optical fiber sensors, pressure measurement, measurement by laser beam, electric breakdown, sonar equipment, fiber lasers, optical fibers, fiber optic probe hydrophone, pressure, shockwave
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Publication date: 24.09.2021
• Year: 2022
• Number of pages: 8 str.
• Numbering: Vol. 69, no. 1
• PID: 20.500.12556/RUL-138102
• UDC: 535:531.787
• ISSN on article: 0885-3010
• DOI: 10.1109/TUFFC.2021.3115629
• COBISS.SI-ID: 78110211
• Publication date in RUL: 11.07.2022

Record is a part of a journal

• Title: IEEE transactions on ultrasonics, ferroelectrics, and frequency control
• Shortened title: IEEE trans. ultrason. ferroelectr. freq. control
• Publisher: Institute of Electrical and Electronics Engineers
• ISSN: 0885-3010
• COBISS.SI-ID: 2882063

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 24.09.2021

Secondary language

• Language: Slovenian
• Keywords: optični senzorji, meritve tlaka, laserski žarki, vlakenski laserji, optični laserji