Generation of multi-line spectrum via intensity modulation for the broadening of Brillouin gain bandwidth

It is an effective approach to use pump with multi-line spectrum to broaden the bandwidth of slow light based on stimulated Brillouin scattering (SBS). A novel method of generating multi-line spectrum is proposed and simulated, through which arbitrary numbers of spectral lines with arbitrary intervals can be obtained. The amplitude of each line is able to be tuned independently. These two merits enable to construct the shape of the gain spectrum of SBS as expected. The maximum broadened bandwidth of the pump is only limited by the bandwidth of related hardwares.