面向超宽带信号处理的光频梳产生技术

Optical Frequency Comb Generation Technology for UWB Signal Processing

针对未来电子信息系统对超宽带信号高速并行处理的需求,提出了一种可应用于光子超宽带信道化处理的相干光频梳产生方法,利用非线性效应实现高重频多梳齿的相干光频梳产生,并且重频及重频差可调谐。通过级联电光调制器产生初始相干光梳,对波分解复用选定的种子梳齿进行注入锁定,并通过非线性光纤、单模光纤及色散平坦光纤的组合模块对锁定后的梳齿复制和展宽,得到了80 GHz和79.4 GHz高重频、平坦度3 dB以内20根梳齿的相干光频梳,能够实现Q/V频段超宽带信号的接收处理,为综合射频一体化、大容量卫星通信等应用宽频段覆盖、大瞬时带宽射频信号的接收处理提供支撑。

In order to meet the needs of high-speed parallel processing of UWB signals in future electronic information systems a coherent Optical Frequency Comb(OFC)generation method is proposed which can be applied to UWB channel-processing.Based on nonlinear broadening effect coherent OFC generation with high repetition rate and multiple combs can be realized and the repetition rate and repetition rate difference can be tuned.The cascaded electro-optical modulator is used to generate the initial coherent optical comb.The seed comb selected by Wavelength Division Multiplexing(WDM)is injected and locked.The locked comb is replicated and broadened by the combination module of nonlinear single-mode and dispersion flattened optical fiber.The coherent OFC with the repetition rate of 80 GHz and 79.4 GHz the flatness of less than 3 dB and 20 combs is obtained which can receive and process the UWB signals in Q/V band and support the reception and processing of the RF signals with wide-band coverage and large instantaneous bandwidth in such applications as RF integration and large-capacity satellite communication.