A laser ablating device for cutting human or animal natural or artificial hard tissue includes: a cutting laser source adapted to provide a pulsed cutting laser beam lasing at a wavelength suitable for ablating the hard tissue； an imaging laser source adapted to provide an imaging laser beam covering a broadband spectral region； and a beam mixing structure and a movable scanner mirror positioned after the beam mixing structure. The beam mixing structure is adapted to redirect the cutting laser beam of the cutting laser source and/or the imaging laser beam of the imaging laser source such that an optical axis of the cutting laser beam is parallel to an optical axis of the imaging laser beam. The scanner mirror is arranged to direct the imaging laser beam and the cutting laser beam when having parallel optical axes.
