| 摘要 |
The invention relates to a method for influencing, in particular for reducing the propagation velocity of light signals (10, 11), which are propagated at a group speed within a wave guide (14), in particular within a fibre-optic in the propagation direction. Pumped radiation in a restricted frequency range is coupled into the wave guide (14) against the propagation direction of the light signals (10, 11), thus causing stimulated Brillouin scattering (SBS) between the pumped radiation and the light signals (10, 11). According to the invention, second pumped radiation, with a frequency that is offset in relation to that of the first pumped radiation, is coupled into the wave guide (14) in addition to said first pumped radiation and the gain spectrum (5) of one pumped radiation at least partially overlaps the loss spectrum (3) of the other pumped radiation. |
