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An optical fiber telecommunications method, a link using the method, and a pumping system for four-wave mixing in particular for the link
An optical fiber telecommunications method, a link using the method, and a pumping system for four-wave mixing in particular for the link
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机译：光纤电信方法，使用该方法的链路以及尤其用于链路的用于四波混频的泵浦系统
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摘要
Optical waves (W1, W2) carrying a signal to be transmitted (S) are guided in a line consisting of optical fibres exhibiting chromatic dispersion. In order to compensate for the effects of this dispersion, a phenomenon of four-wave mixing is caused at an intermediate point of the line, by the use of a pumping light injected into a mixing fibre (8). According to the invention, this pumping light consists of two pump waves (P1, P2). The polarisations (V1, V2) of these two waves are orthogonal. Their optical frequencies (@P1, @P2) are substantially symmetric to one another with respect to a neutral frequency (@o) cancelling the chromatic dispersion of this mixing fibre. The invention applies particularly to links of great length. IMAGE
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