Abstract

Optical fibers have proved to be a very attractive medium for studies of various nonlinear phenomena. The development of fibers doped with rare-earth ions allows also the study of resonant nonlinear interactions in fibers. In particular, coherent effects become important when pulses shorter than or comparable to the dephasing time of the impurity ions propagate in the fiber. In this paper, we describe experiments in which we have investigated photon-echo in Er-doped fibers at 4.2 K, observed new phenomena, and demonstrated some of its applications.

© 1992 Optical Society of America