Novel laser-induced cavitation: the constrained ring bubble

Paul Prentice, Svetlana Zolotovskaya, Edik Rafailov

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    Using high speed photography at sub-microsecond temporal resolution, we observed laser-induced cavitation within a thin film of liquid. In accordance with the literature, focusing a pulse of a gaussian-like intensity distribution into the liquid, instigated a disk-shaped cavity. The propagation of an acoustic transient, generated during the formation and expansion of the cavity, is evidenced by secondary cavitation stimulated in the surrounding liquid. Introducing a laguerre-gauss holographic diffractive optic element into the beam path, re-distributes the optical energy into the so-called 'doughnut mode', with an axial intensity minimum. Focusing this modulated pulse into the liquid induced a ring-shaped cavity with a notably different dynamic to that of the disk cavity, due primarily to the encapsulated droplet, which is present from cavity initiation through expansion and subsequent deflation. In this paper we present initial observations on the novel dynamics of the ring-shaped cavity and discuss several of the distinctive features. Particularly the secondary cavitation induced in the surrounding liquid, and the implicated multiplexing of the acoustic transient generated during the ring-cavity expansion, is of interest.

    Original languageEnglish
    Title of host publicationPhotons Plus Ultrasound
    Subtitle of host publicationImaging and Sensing 2010
    EditorsAlexander A. Oraevsky, Lihong V. Wang
    Place of PublicationBellingham
    PublisherSPIE-International Society for Optical Engineering
    Number of pages10
    ISBN (Print)9780819479600
    DOIs
    Publication statusPublished - 2010
    EventSPIE Photonics West 2010: Photons Plus Ultrasound - Imaging and Sensing 2010 - The Moscone Center, San Francisco, United States
    Duration: 24 Jan 201026 Jan 2010
    http://spie.org/x39144.xml

    Publication series

    NameProceedings of SPIE
    Volume7564
    ISSN (Print)0277-786X

    Conference

    ConferenceSPIE Photonics West 2010: Photons Plus Ultrasound - Imaging and Sensing 2010
    CountryUnited States
    CitySan Francisco
    Period24/01/1026/01/10
    Internet address

    Keywords

    • Cavitation
    • Pulsed laser
    • Ring bubble
    • Acoustic transient
    • Droplet compression
    • Holographic diffractive optical element
    • Laguerre-gaussian
    • Induced breakdown
    • Plasma formation
    • Generation
    • Emission
    • Dynamics
    • Arrays
    • Water
    • Disruption
    • Particles

    Cite this