Numerical simulation on fiber Brillouin amplifier

The theory of fiber Brillouin amplifier is investigated by numerical solution combinating interpolation method and Runge-Kutta method. Meanwhile, the most complete characterization and comparison of FBAs for pump power, initial signal power and fiber length is obtained. Through the analysis and comparison, the results show that the amplification efficiency can reach 90% based on the SBS and the most of the power transfer occurs within the first 20% of the fiber length. The output signal power is linear increased with increasing of the initial pump and initial signal, respectively. The high-gain Brillouin amplifier can be obtained when then fiber length is about 26km.