Enhanced self-heterodyne synthetic aperture imaging ladar (SAIL) with a transmitter of two coaxial polarization-orthogonal beams, uses heterodyne receiver to receive echo signal, self-heterodynes the two polarization-orthogonal echo signals during signal processing to eliminate the phase error generated by atmospheric turbulence, mechanical trembling and ladar system. A laboratory demonstration of enhanced self-heterodyne SAIL for two-dimensional (2D) target is proposed, the data collection and the image processing of this demonstration is mathematically detailed, and its imaging experiments for 2D target are also presented. The achieved imaging resolutions are 3.6 mm×3.6 mm, and two point-array targets are also reconstructed with high contrast. The experimental results prove that the enhanced self-heterodyne SAIL is feasible for 2D imaging.