Fiber laser Brillouin pump 1 Experimental setup 1 Fiber lasers 1 L-band region 1 Laser tuning 1 Light polarization 1 Microwave photonics 1 Narrow-line width 1 Nonlinear medium 1 Pumping (laser) 1 Radio over fiber 1 Sagnac loop mirror 1 Scattering 1 Semiconductor optical amplifier 1 Stimulated Brillouin 1 Stimulated Brillouin scattering 1 Tunabilities 1 Tunable laser sources 1 Tunable microwave 1 Ultrasonics 1