Abstract: We proposed a stimulated Brillouin scattering (SBS) optoelectronic oscillator (OEO) based on a self-polarization-stabilization dual-loop structure.By utilizing the narrow bandwidth gain spectrum of SBS to achieve the conversion from phase modulation to intensity modulation (PM-IM), and selecting the oscillation mode of the OEO. A polarization self-polarization-stabilization dual-loop structure was constructed. After the input light in each loop was reflected by a 45° Faraday rotator mirror. It would  return to its path through a 45° Faraday rotator and different lengths of single-mode fiber, ensuring that the polarization state of the output signal and the input signal always differed by 180°, thereby eliminating external mechanical vibrations and temperature disturbances. Since the loop structure was reflective and bidirectional, the required fiber length was reduced by half. The experimental results show that the OEO can achieve frequency tuning by changing the pump wavelength, and  can generate 
microwave signals of 1—16 GHz, with a side mode suppression ratio (SMSR) of 67.14 dB at 10 GHz, and a phase noise of -116.3 dBc/Hz@10 kHz.

Key words: stimulated Brillouin scattering, optoelectronic oscillator, self-polarization-stabilization, dual-loop