TRANSMISSION OF INFORMATION BY OPTICAL IMPULSES OF EQUIVALENT DISPERSION

Abstract

The article is devoted to the general problem of increasing the spectral efficiency of fiberoptic data transmission systems. One possible approach to solving this problem is considered. The essence of the approach is the recognition of signals in the spectral region. It is assumed that the energy spectrum of the optical pulse is stable to material dispersion. In this case, optical pulses with a distinct spectral composition undergo, in general, different dispersion evolution. The problem solved is reduced to the synthesis of optical signals having approximately one spectral width and approximately equal parameters of the dispersion broadening. The problem is formulated in mathematical terms. The problem is solved for pulses with a rectangular spectrum and with a Gaussian spectrum. It is shown that information can be transmitted at a rate greater than one bit in one pulse by means of such signals. The problem is solved for a narrow-band signal under conditions of prevailing material dispersion.