All-optical pulse compression of broadband microwave signal based on stimulated Brillouin scattering.
All-optical pulse compression of broadband microwave signal based on stimulated Brillouin scattering.
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DOI：
10.1364/oe.24.005162
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发表时间：
2015-12
期刊：
影响因子：
3.8
通讯作者：
Xin Long;Weiwen Zou;Jianping Chen
中科院分区：
文献类型：
--
作者：
Xin Long;Weiwen Zou;Jianping Chen
从理论和实验两方面研究了光纤中受激布里渊散射（SBS）脉冲压缩技术。宽带微波信号被电光调制到注入光纤一端的泵浦光波上。光纤中的声波继承了泵浦光的振幅和相位信息，声波与泵浦光的耦合导致了泵浦光和微波信号的自相关过程。通过对SBS耦合方程的推导表明，泵浦光放大后的短脉冲探测光具有自相关公式的性质。宽带微波信号的全光脉冲压缩是在检测到的探测脉冲与无SBS相减后实现的。进行了概念验证实验。在4.3GHz载波频率下，成功实现了扫频范围为1GHz的线性调频微波信号的脉冲压缩，与理论分析结果吻合较好。
Pulse compression processing based on stimulated Brillouin scattering (SBS) in an optical fiber is theoretically and experimentally demonstrated. Broadband microwave signal is electro-optically modulated onto the pump lightwave that is launched into one end of the fiber. Acoustic wave in the fiber inherits the amplitude and phase information of the pump lightwave and thus the coupling between the acoustic wave and pump lightwave leads to the auto-correlated process of the pump lightwave as well as the modulated microwave signal. Derivation of the SBS coupling equations shows that the short-pulse probe lightwave amplified by the pump lightwave possesses the nature of auto-correlation formula. All-optical pulse compression of the broadband microwave signal is implemented after a subtraction between the detected probe pulse with and without SBS. A proof-of-concept experiment is carried out. The pulse compression of a linear frequency-modulated microwave signal with 1 GHz sweep range at the carrier frequency of 4.3 GHz is successfully realized, which well matches the theoretical analysis.