A method for generating an acoustic source in a liquid includes
transmitting an optical pulse through the liquid so the optical pulse
reaches I.sub.LIB through pulse compression and ionizes a liquid volume.
The pulse compression is achieved through at least one of a) group
velocity dispersion induced longitudinal compression of a frequency
chirped optical pulse and b) transverse self focusing via a nonlinear
optical Kerr effect. The acoustic source can be generated at a
controllable remote location many meters from the optical source. The
optical source can be a laser or other suitable optical device.