  We demonstrate Optical-Resolution Photoacoustic Microscopy (OR-PAM), where
the optical field is focused and scanned using Digital Phase Conjugation (DPC)
through a multimode fiber. The focus is scanned across the field of view using
digital means, and the acoustic signal induced is collected by a transducer.
Optical-resolution photoacoustic images of a knot made by two absorptive wires
are obtained and we report on resolution smaller than 1.5{\mu}m across a
201{\mu}m by 201{\mu}m field of view. The use of a multimode optical fiber for
the optical excitation part can pave the way for miniature endoscopes that can
provide optical-resolution photoacoustic images at large optical depth.
