Revisiting the pioneering work of Avizonis et al. [Appl. Phys. Lett. 31, 435 (1977)], we experimentally demonstrate that wave-front reversal of picosecond optical signals can be efficiently achieved with low-gain parametric amplification. The use of a KTP crystal permits forward phase conjugation of radiation with high divergence (40 mrad) and a broad spectrum (20 nm). The potential application of this technique to compensate for the group-velocity dispersion of standard optical fibers in the 1.55-μm window is discussed.
© 1996 Optical Society of America
Original Manuscript: December 4, 1995
Published: June 15, 1996
L. Lefort and A. Barthelemy, "Revisiting optical phase conjugation by difference-frequency generation," Opt. Lett. 21, 848-850 (1996)