Experimental observation of the competition between stimulated Brillouin scattering, modulation instability and stimulated Raman scattering in long single mode fiber

The complicated competition relationships between stimulated Brillouin scattering (SBS), modulation instability (MI) and stimulated Raman scattering (SRS) are observed, by injecting rectangular optical pulses with duration of 200 ns into 50 km single mode fiber. Under certain conditions, SBS suppresses MI by converting the transmission power to the backscattering power. MI also can suppress SBS by broadening the spectrum of the transmission light and decreasing the Brillouin gain. When SRS occurs, MI and SBS are suppressed simultaneously because a large amount of transmission power is consumed by converting to the Raman Stokes light.