We describe a new one-dimensional synthetic aperture imaging laser radar (ladar) using the resonant sensitivity of a microchip laser to frequency-shifted optical feedback and galvanometric scanning of the target under investigation. In our experiment, the laser is both the source and the detector, providing optical amplification with self-aligned heterodyne detection. By using galvanometric scanning, we achieve an along-track spatial resolution better than the diffraction limit.
© 2006 Optical Society of America
Original Manuscript: March 16, 2006
Revised Manuscript: June 23, 2006
Manuscript Accepted: June 28, 2006
Published: September 25, 2006
Arnaud Witomski, Eric Lacot, Olivier Hugon, and Olivier Jacquin, "Synthetic aperture laser optical feedback imaging using galvanometric scanning," Opt. Lett. 31, 3031-3033 (2006)