基于受激布里渊散射的30GHz毫米波单边带调制生成技术

本文提出了一种基于受激布里渊散射原理的单边带调制产生30GHz毫米波的新方法，可应用于光载射频系统。该方法利用一个双布里渊散射移频结构生成泵浦光，并将其反向注入到传输信号光的25 km单模光纤；通过受激布里渊散射，直接放大受调制信号光的正三阶边带，实现光载波的单边带调制，有效改善由色散效应引入的功率涨落问题，保证了毫米波功率稳定。此外，信号光和泵浦光由同一个激光器产生，有效消除两者间的相对频率漂移，从而大大提升了毫米波生成系统的频率稳定性。通过我们的方法，实验系统所生成的毫米波功率增益了21dB，其3dB线宽为10kHz。

30-GHz millimeter-wave carrier generation with single sideband modulation based on stimulated Brillouin scattering

A new technique to generate millimeter(mm)-wave carrier of 32.57 GHz (fLO=10.85 GHz) with Single Sideband Modulation (SSB) for Radio-over-Fiber (RoF) systems is experimentally demonstrated by using Stimulated Brillouin Scattering (SBS). The SSB is realized by directly amplifying the 3^rd sideband of the modulated optical carrier in the process of SBS. The pump wave is provided through a Double Brillouin Scattering Frequency Shifting configuration. The use of the same laser source to generate the pump wave ensures the stability of the mm-wave generation system since the relative frequency shift between them can be eliminated. In addition, the mm-wave carrier obtains an RF power gain of 21 dB with the SBS amplification and 3-dB bandwidth of 10 kHz.