摘要
为了能够充分利用微波光子倍频优势并简化系统复杂度,提出一种基于双平行马赫-曾德尔调制器(DPMZM)和单行载流子光电二极管(UTC-PD)的宽带太赫兹矢量信号产生及光纤传输方案,通过适当地调整DPMZM直流偏压和调制指数,矢量信号被调制在光波的+3阶边带,本振信号被调制在光波的-3阶边带,并采用VPI软件对方案进行了仿真验证。仿真结果表明:当系统采用36.7 GHz的本振信号六倍频后,产生了载频为220 GHz、码速率为20 GSym/s的正交相移键控的太赫兹矢量信号,经1~4 km的光纤传输,接收机功率损失小于3 dBm。
In order to make full use of the advantages of microwave photon frequency doubling and simplify the system complexity,a scheme of broadband terahertz vector signal generation and fiber transmission based on dual-parallel Mach-Zehnder modulator(DPMZM)and uni-traveling-carrier photodiode(UTC-PD)is proposed in this paper.A vector signal is modulated in the positive third-order sideband of the light wave,and the local oscillator signal is modulated in the negative third-order sideband of the light wave.The scheme is simulated and verified by VPI software.The simulation results show that when the system adopts six times the frequency of 36.7 GHz local oscillator signal,a terahertz vector signal with orthogonal phase shift keying with carrier frequency of 220 GHz and code rate of 20 GSym/s is generated.After 1-4 km optical fiber transmission,the power loss of the receiver is less than 3 dBm.
作者
董洪建
葛锦蔓
李琪
DONG Hongjian;GE Jinman;LI Qi(China Academy of Space Technology,Beijing 100094,China;National Key Laboratory ofScience and Technology on Space Microwave,China Academy of Space Technology(Xi'an),Xi'an 710100,China)
出处
《光通信技术》
2022年第1期20-24,共5页
Optical Communication Technology
基金
国家重点研发计划项目(2019YFB2203202)资助
国家自然科学基金项目(11904283)资助。
