上海交通大学智能微波光波融合创新中心（imLic）博士生王鑫的工作——Theoretical and experimental optimization of SBS-based pulse compression of RF broadband signal（基于SBS的RF 信号脉冲压缩实验优化）的相关成果近期被Photonics Technology Letters期刊接收发表，该工作得到了国家重点研发计划（2019YFB2203700）、国家自然科学基金（61822508）的部分资助。该工作对基于受激布里渊散射的全光RF信号脉冲压缩系统的性能进行了理论分析和实验验证，通过设定脉冲压缩结果的第一零点位置作为衡量脉冲压缩波形质量的标准，探讨了泵浦功率、探测功率、待压缩信号时间长度、布里渊增益系数和消光比等一系列因素对脉冲压缩结果的影响，建立了数学模型，完成了理论仿真和实验验证。该工作对全光域RF信号的脉冲压缩的进一步发展及应用具有一定的借鉴意义。
摘要: We investigate relevant parameters which affect the all-optical pulse compression system of a microwave (RF) broadband signal based on stimulated Brillouin scattering (SBS) in an optical fiber. These parameters include the waveform, the extinction ratio (ER) of the probe pulse, the power of the pump and probe lightwaves, the temporal period of the signal to be compressed, and the Brillouin gain coefficient of the fiber. We observe that the better modulation waveform of the probe pulse is a rectangular short pulse. The most critical parameter is the ER of the probe pulse, which is positively correlated with the all-optical RF pulse-compression performance. When the ER is limited to be less than ~35 dB, the Brillouin gain coefficient, the temporal period of the signal to be compressed, and the power of the pump lightwave are all positively correlated with the RF pulse-compression performance. The experimental results verify the theoretical expectation and the pulse-compression performance is experimentally optimized.