摘要
从光差拍产生电磁波的光电流表达式出发,讨论了光差拍条件,探讨了光差拍产生电磁波的频率上限及制约因素.Matlab计算表明,产生电磁波的最高频率主要受光电探测器带宽的限制,可覆盖无线频段的最高端.笔者及其他学者分别在实验上成功产生了ROF系统毫米波和THz波.
Starting with the optical current expression of an electromagnetic wave signal generated by opticalheterodyning,the conditions of optical heterodyning are discussed, and the top frequency and restriction factors for the electromagnetic wave are analyzed. The Matlab simulations show that the top frequency of the electromagnetic wave is mainly restricted by the frequency bandwidth of the photodetector, and is able to cover the top of the radio frequency band. The mm-wave of a ROF system and THz-wave are successfully obtained in optical heterodyning experiment.
出处
《大学物理》
北大核心
2014年第5期26-31,共6页
College Physics
基金
"大学物理实验"广东省资源共享课程
优质课程项目资助
关键词
电磁波
光差拍
频率上限
ROF技术
electromagnetic wave
optical heterodyning
top frequency
radio over fiber technology
