A microwave photonic mixer based on stimulated Brillouin scattering with high image rejection capacity

The electrical mixer is limited by operation bandwidth and parallel processing capacity, and is suffering from increasingly serious electro-magnetic interference. By introducing photonic properties, microwave photonic technology has many advantages compared to the traditional microwave technology, such as low loss, large bandwidth, high parallel processing capacity, anti-electromagnetic interference and so on. In this work, a Stimulated Brillouin Scattering (SBS) based microwave photonic mixer with high image rejection capacity is proposed. Due to the high wavelength-selectivity and wideband tenability of the SBS process, the image rejection ratio of the mixer exceeds 40dB over the IF range of 80 MHz to 2 GHz and the RF range of 2 to 40 GHz.