Investigation of Equipment and Processes that limit Photon Echo Signal Processing

Justine Bell, William Randall Babbitt

Norman A. Kurnit, Sven R. Hartmann

Valéria Loureiro da Silva, Yaron R. Silberberg

Recently we reported the first photon echo experiments in Er-doped fibers, and described their application to ultrafast time domain signal processing [1]. Our previous results were obtained with absorbing Er-doped fibers at 4°K, and our signals at 1.53µm were attenuated by the fiber. In this paper we report photon echo experiments with Er-doped amplifiers. We expect the photon echo process in amplifiers to yield strong echoes, perhaps stronger then the input signal. This could be important for signal processing applications. To our knowledge this is the first demonstration of photon echo in any inverted system.

Yaron R. Silberberg, Valéria Loureiro da Silva, J.P. Heritage +2 more

Accumulated photon echo experiments in erbium-doped optical fibers are reviewed. The experiments demonstrate the advantage of the single-mode optical fibers for investigations of resonant coherent effects. A theoretical analysis of the accumulated echo process which is particularly suitable for the highly saturated, highly absorptive experiments in fibers is presented. The capability of ultrafast time-domain signal processing in the doped fibers is shown. The inhomogeneous width of the 1.53- mu m transition investigated can support pulses at short as 0.5 ps. With an estimated approximately 1-ns homogeneous dephasing time, the fibers can handle (store or process) about 1000 b at rates of 1 Tb/s.>

Cheng Li, Xiangyang Yu

В. В. Самарцев, Ramil G. Usmanov, G. M. Ershov +1 more