基于叠印啁啾光纤布拉格光栅的宽谱微波光子信道化接收方法

提出了利用叠印啁啾光纤布拉格光栅(S-CFBG)实现宽谱微波信号光子信道化接收的方法。利用一个S-CFBG产生光频梳(OFC),接收的微波信号被强度调制器调制到OFC的各个载波上。第二个S-CFBG对不同的边带进行滤波,利用波分复用(WDM)解复用器进行信道分离,实现对宽谱微波信号频率的实时测量。该方法还可以同时检测不同射频(RF)载波上所携带的数据信息,无需传统的电本振源阵列,简化了系统结构。建立了测量范围为0～20GHz,测量精度为0.5GHz的宽谱微波信号信道化接收仿真系统。实现了不同RF频率上携带信息的实时同步检测,并对接收误码性能进行了分析。

Broadband Microwave Photonic Channelized Receiver Based on Superimposed Chirped Fiber Bragg Grating

A photonic approach to implement a microwave channelized receiver based on superimposed chirped fiber Bragg grating (S-CFBG) is proposed. An optical frequency comb (OFC) is generated using the first S-CFBG. Broadband microwave signal is multicast by the OFC, spectrally sliced by the second S-CFBG and channelized by optical wavelength division multiplexer (WDM) de-mux. Broadband microwave signal with frequency measurement range form 0 to 20 GHz and accuracy of 0.5 GHz is achieved by simulation. 156.25 Mbit/s non-return-to-zero (NRZ) signals, which are located at different radio frequency (RF) carrier waves, can be detected simultaneously and instantaneously without local RF source array. The bite error rate (BER) performance of receiver is researched.