Advantage of Inner-Grating-Multi-mode laser (iGMlaser)

We demonstrated the advantage of inner-grating-multi-mode (iGM) lasers for suppressing Stimulated-Brillouin-scattering (SBS) in comparison with normal single-mode DFB lasers. We found that iGM laser with over 18 longitudinal-modes successfully reduces SBS down to Rayleigh-scattering level.