Fiber Brillouin amplifier based on orthogonal double pumps

[Display omitted] We introduce a fiber Brillouin amplifier (FBA) based on the use of orthogonal double pumps to overcome the fiber random birefringence effect which will reduces the gain and introduces the amplified signal power fluctuation in FBA. The signal with arbitrary state of polarization (SOP) can obtain the highest amplification gain without polarization control. By using the proposed scheme, compared with the traditional FBA which based on just single pump, the measured maximum gain increases by 3.74dB and the gain gap of the signal with different SOPs reduces to 2.7dB. Theoretically, the gain difference and fluctuation for signal with arbitrary SOPs can be further diminished to zero by the proposed double orthogonal pumps mechanism.