title: Revisiting optical phase conjugation by difference-frequency generation.
abstract: 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-microm window is discussed.
authors.forename: L
authors.initials: L
authors.lastname: Lefort
authors.forename: A
authors.initials: A
authors.lastname: Barthelemy