一种使用Sagnac环和I/Q探测的全光微波测量方案

doi:10.19665/j.issn1001-2400.2022.02.007

Abstract

Abstract:

For high-speed wireless communication,the Internet,new-generation radar system and real-time signal processing system,microwave measurement systems with a large instantaneous bandwidth (greater than 10GHz) and wide working frequency range (several MHz to several hundred GHz) are required.To meet these demands,a simple and novel optical approach to implementing the broadband measurement approach is proposed.In the experiment,the Doppler frequency shifts are estimated with clear direction discrimination and high resolution with the max error of 8 Hz.Then,the approach is applied for phase detection,and the phase shifts are successfully measured and estimated for microwave signals with the operating frequency ranging from 10 to 40 GHz.The max error of phase measurement is calculated to be less than 7 degrees.The approach is simple,easy to implement,multifunctional and tunable,so that it can provide a more competitive approach to realizing the measurement of the microwave signals for future wideband electronics applications than electronic solutions.

Key words: phase detection, Doppler frequency shift, microwave photonics, I/Q detection, sagnac loop

CLC Number:

TN29

KANG Bochao,FAN Yangyu,TAN Qinggui,GAO Yongsheng. All-optical photonic microwave measurement approach based on the Sagnac loop and I/Q detection[J].Journal of Xidian University, 2022, 49(2): 50-57.

Figures/Tables 6

References 22

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方案	工作带宽/ GHz	能否同时实现相位和频率测量	优势	局限性
文中方案	10~40	是	大工作带宽且结构简单	直流偏移影响较大
文献[9]	10~40	否	频率映射较好	系统复杂度较大和分辨率较差
文献[14]	10~40	否	结构简单且具高分辨率	DWDM频率响应较差
文献[20]	12~18	否	具高测量精度和抗干扰	低系统增益和需额外的参考信号
文献[22]	10~18	是	可以远端接收和具高测量精度	低系统增益和系统稳定性差

All-optical photonic microwave measurement approach based on the Sagnac loop and I/Q detection

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