Abstract: A laser system for acousto-optics imaging is disclosed. The system comprises: a continuous wave laser source; a first beam splitter configured to split a laser emitted by the continuous wave laser source into a lasing beam and a reference beam; a lasing optical fiber diffusing the lasing beam to a subject; a reference optical fiber providing the reference beam; a collecting optical fiber capable of receiving a scattered beam from the subject; a second beam splitter for merging the scattered and reference beams into a merged beam, and at least one photodetector assembly with a bandwidth higher than the ultrasound frequency to detect the merged beam.