A stimulated Brillouin scattering suppression method in the remote interferometric fiber sensing system based on electro-optic phase modulator and modified phase-generated carrier

We propose and demonstrate a stimulated Brillouin scattering (SBS) suppression method in the remote interferometric fiber sensing systems based on electro-optic phase modulator and modified phase-generated carrier (PGC) demodulation method. The phase of the laser source is modulated using an electro-optic phase modulator, which suppresses SBS and generates the high-frequency carrier signal for PGC demodulation, simultaneously. The results indicate that the maximum input power of the system can be increased effectively. This work provides a simple method for suppressing SBS in the remote interferometric fiber sensing systems.