Abstract: An optical breakdown acoustic transducer can generate high-bandwidth, high amplitude acoustic waves via an optical breakdown process. The optical breakdown acoustic transducer can include a vessel having an interior cavity that is substantially filled with a fluid and a light source that emits light. The light can be directed through an optical element that focuses the light to at least one focal point located within the fluid, thereby causing optical breakdown and generation of an acoustic shockwave. The acoustic shockwave can then be coupled into a medium surrounding the optical breakdown acoustic transducer via an acoustic outlet coupled to the vessel. The acoustic output of the optical breakdown acoustic transducer can be tuned by adjusting the properties of the optical source and/or the shape of the cavity containing the fluid. The optical breakdown acoustic transducer can be used for imaging, sensing, communication, and mechanical disruption.