摘要
通过抑制微波光子链路中的非线性失真因子可以提高MPL的带宽和无杂散动态范围(SFDR)。提出了一种基于双电极马赫-曾德尔调制器和平衡探测的线性化方案,该方案结合了相位控制,优化偏置电压以及平衡探测技术,理论分析结果显示,系统可消除二阶谐波失真(HD2),抑制三阶交调失真(IMD3)和五阶交调失真(IMD5)。利用OptiSystem软件进行了仿真分析,结果显示:二阶交调失真和HD2被完全消除,IMD3和IMD5被抑制在基底噪声以下,其中,IMD3被抑制约45.76 dB,三阶SFDR达到114 dB·Hz^2/3,五阶SFDR达到137.97 dB·Hz^4/5。
The bandwidth and spurious-free dynamic range(SFDR) of the microwave photonic link can be improved by suppressing the nonlinear distortion factor in the microwave photonic link. A linearization scheme based on double-electrode Mach-Zehnder modulator and balanced detection is proposed. This scheme combines phase control, optimized bias voltage, and balanced detection techniques. Theoretical analysis results show that the proposed system can eliminate second-order harmonic distortion(HD2), as well as suppress third-order inter-modulation distortion(IMD3) and fifth-order inter-modulation distortion(IMD5). Simulation analysis carried out on OptiSystem programming environment shows that the second-order inter-modulation distortion and HD2 are completely eliminated, and IMD3 and IMD5 are mainly suppressed under the background noise. Among them,the IMD3 is suppressed by about 45.76 dB, the third-order SFDR reaches 114 dB·Hz^2/3, and the fifth-order SFDR reaches 137.97 dB·Hz^4/5.
作者
赵峰
蔡卫童
张龙龙
芦雨
武申申
Zhao Feng;Cai Weitong;Zhang Longlong;Lu Yu;Wu Shenshen(School of Electronic Engineering,Xi'an University of Posts and Telecommunications,Xi'an,Shaanxi 710121,China)
出处
《光学学报》
EI
CAS
CSCD
北大核心
2019年第11期30-36,共7页
Acta Optica Sinica
基金
国家自然科学基金面上项目(61875164)
关键词
探测器
平衡探测
线性化方法
三阶交调失真
二阶交调失真
二阶谐波失真
detectors
balanced detection
linearization method
third-order inter-modulation distortion
second-order inter-modulation distortion
second-order harmonic distortion
