A coherence gated photoacoustic remote sensing system that images the subsurface structure in a sample with optical resolution is an interlo with an excitation beam source configured to generate an excitation beam that guides an ultrasonic signal in the sample at the excitation position. An interrogation beam source configured to generate an interrogation beam incident on a sample at the junction position, the portion of the interrogation beam returning from the sample showing the generated ultrasonic signal and interloking. A gatement beam is a low-coherent beam, an interaction beam source and an optical system that focuses the excitation beam on a sample at the excitation position and the interaction beam on the sample at the excitation position, at least interlaced. The logation position is below and within the surface of the sample, with an optical system and a low coherence interferometer that separates the return of the intervention beam in response to the sample's interaction event. It may be included.
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