Stimulated brillouin scattering (sbs) suppression in an optical communications system

A method for stimulated Brillouin scattering suppression in an optical transmission system, the method comprising:

• generating two or more high frequency dithering signals, each having a frequency at least twice a highest information bearing modulation frequency, a frequency of a first one of the high frequency dithering signal being multiple times higher than a frequency of a second one of the high frequency dithering signals;
• adjusting the gain and phase of each of the two or more dithering signals at a first set of gain and phase control circuits;
• splitting each of the two or more adjusted dithering signals at an output of the first set of gain and phase adjustment circuits, each of the two or more adjusted dithering signals split into at least a first portion and a second portion;
• directly modulating a light source with combined first portions of the split high frequency signals;
• adjusting each of the second portions of the high frequency signals by a second set of phase and gain adjustment circuit;
• emitting a light beam from the light source while directly modulating said light source with the combined first portions of the high frequency signals;
• externally intensity modulating the light beam emitted from the light source with both gain and phase adjusted second portions of the high frequency signals and with a radio frequency (RF) information carrying signal;
• and
• coupling onto an optical fiber the light beam modulated with the RF information-carrying signal.