20.500.12556/RUL-138102 Localized measurement of a sub-nanosecond shockwave pressure rise time 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. optical fiber sensors pressure measurement measurement by laser beam electric breakdown sonar equipment fiber lasers optical fibers fiber optic probe hydrophone pressure shockwave optični senzorji meritve tlaka laserski žarki vlakenski laserji optični laserji true false true Angleški jezik Slovenski jezik Članek v reviji 2022-07-11 08:08:21 2022-07-11 08:08:26 2022-09-15 04:16:17 0000-00-00 00:00:00 2022 0 0 8 str. no. 1 Vol. 69 Jan. 2022 0000-00-00 Zaloznikova Objavljeno NiDoloceno 0000-00-00 0000-00-00 2021-09-24 535:531.787 0885-3010 10.1109/TUFFC.2021.3115629 78110211 Petelin_..._Localized_Measurement_of_a_Sub-Nanosecond.pdf Petelin_..._Localized_Measurement_of_a_Sub-Nanosecond.pdf 1 1103F994A68A26E16491084833B3B2D9 01ee6869bc5122f2d4a78a16ede81a5d34dcf255a4eba660a907e29e9b12579a 92b7ba84-00e0-11ed-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=158309 https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=9548077 1 a86ed678-00df-11ed-8aca-00155dcfd717 https://repozitorij.uni-lj.si/Dokument.php?lang=slv&id=158307 Fakulteta za strojništvo 0 0 0