Measurement of Instantaneous Microwave Frequency by Optical Power Monitoring Based on Polarization Interference

被引：42
|
作者：
Li, Jing [1 ]
Pei, Li [1 ]
Ning, Tigang [1 ]
Zheng, Jingjing [1 ]
Li, Yujian [1 ]
He, Ruisi [2 ]
机构：
[1] Beijing Jiaotong Univ, Key Lab All Opt Network & Adv Telecommun Network, Inst Lightwave Technol, Beijing 100044, Peoples R China
[2] Beijing Jiaotong Univ, State Key Lab Rail Traff Control & Safety, Beijing 100044, Peoples R China
来源：
JOURNAL OF LIGHTWAVE TECHNOLOGY | 2020年 / 38卷 / 08期
基金：
国家重点研发计划;
关键词：
Instantaneous frequency measurement; microwave photonic; optical power monitoring; ADJUSTABLE MEASUREMENT RANGE; MODULATION;
D O I：
10.1109/JLT.2020.2970437
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
A photonic-assisted approach for instantaneous frequency measurement based on optical power monitoring is proposed and demonstrated. Instead of using optical filter, a dual-polarization Mach-Zehnder modulator is used to modulate the unknown RF signal with a designed electrical time delay. Due to the property of electrical time delay, the frequency information is firstly converted to phase shift and then to the optical power. By monitoring the optical power, a monotonic relationship between the incident microwave frequency and optical power ratio can be easily established. A detailed theoretical analysis is carried out to illustrate the mechanism of the proposed instantaneous frequency measurement setup. Simulation has been performed to investigate the tuning of measurement range and the impact of imperfection devices. A proof-of-concept experiment has been carried out to verify the mechanism.
引用
收藏
页码：2285 / 2291
页数：7
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