Photonic aided bandpass sampling in coherent phase modulated radio-over-fiber links

Photonic aided bandpass sampling in coherent phase modulated radio-over-fiber links
复制标题

相干相位调制无线电光纤链路中的光子辅助带通采样

DOI:
10.1016/j.optcom.2016.02.015
复制
发表时间:
2016-06
影响因子:
2.4
通讯作者:
Kun Xu
Kun Xu
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Minghua Cao;Jianqiang Li;Jian Dai;Yitang Dai;Feifei Yin;Yue Zhou;Kun Xu

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我们通过实验提出了一种数字相干接收机,该接收机采用光子辅助带通采样技术用于相位调制光纤无线电(RoF)链路。利用光强度调制器(IM)作为带通采样器,在光本振上执行编码的开关键控脉冲序列。实验证明,利用模拟带宽仅为800 MHz的平衡光电二极管(BPD),可以成功地检测出射频载波频率为5.2 GHz、10.2 GHz和15.2 GHz、带宽为20 MHz的四相相移键控(QPSK)调制数据信号。它表明,所需的BPD和ADC的模拟带宽可以显着减少在直接采样相干RoF通信系统。
We have experimentally presented a digital coherent receiver employing photonic aided bandpass sampling technology for phase-modulated radio-over-fiber (RoF) links. An optical intensity modulator (IM) is utilized as the bandpass sampler which performs encoded on–off keyed pulse sequence on the optical local oscillator. Quaternary Phase Shift Keying (QPSK) modulated data signal with 20 MHz bandwidth at 5.2 GHz, 10.2 GHz and 15.2 GHz RF carrier frequency is experimentally demonstrated to be successfully detected by usingbalancedphotodiodes(BPDs)with only 800 MHz analog bandwidth. It demonstrates that the required analog bandwidth of BPDs and ADCs can be dramatically reduced in a direct sampled coherent RoF communications system.
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