传输系数自校准的宽带模拟信号光纤传输系统  

A Wideband Analog Signal Fiber Transmission SystemWith Self-Calibration of Transmission Coefficient

作　　者：刘逸飞[1] 郭景海[1] 吴伟[1] 程引会[1] 马良[1] 赵墨[1] 李进玺[1] LIU Yifei;GUO Jinghai;WU Wei;CHENG Yinhui;MA Liang;ZHAO Mo;LI Jinxi(State Key Laboratory of Intense Pulsed Radiation Simulation and Effect,Northwest Institute of Nuclear Technology,Xi’an 710024,China)

机构地区：[1]强脉冲辐射环境模拟与效应国家重点实验室,西北核技术研究所,西安710024

出　　处：《现代应用物理》2022年第2期24-31,共8页Modern Applied Physics

基　　金：强脉冲辐射环境模拟与效应国家重点实验室基金资助项目(SKLIPR1702)。

摘　　要：分析了模拟信号光纤传输中电光幅度调制的基本原理及导致传输系数难以恒定的原因,提出了一种集成可控标准方波的方法,用于传输系数的实时修正。以线性晶体管放大器和单片机微处理器为核心,设计了具有传输系数自校准功能的模拟信号光纤传输系统,并进行了实验室标定。标定结果表明,传输系统-3 dB带宽的工作频率为20 kHz~1.38 GHz,时域传输系数为0.66,线性动态范围为40 dB,本底噪声为4 mV。比较了2种不同测试环境下传输系统的性能,修正前,传输系数测量的相对偏差高达9%,修正后,相对偏差可小于1%,验证了传输系数自校准的可行性与准确性。在此基础上,介绍了传输系统在前沿为380 ps脉冲波形的传输测试和电磁脉冲辐照下线缆耦合电流测试上的应用,测量结果表明,传输系统具有良好的信号保真度和抗干扰性能,能提高测量准确性,具有广阔的应用前景。Based on linear transistor amplifier and single chip microprocessor,an analog signal optical fiber transmission system with self-calibration of transmission coefficient is designed for its real-time correction,and calibrated in the laboratory.The calibration results show that the working frequency of the transmission system with-3 dB bandwidth is 20 kHz~1.38 GHz,the time-domain transmission coefficient is 0.66,the linear dynamic range is 40 dB,and the background noise is 4 mV.The performance of the transmission system designed in two different test environments is compared.Before correction,the relative deviation of the measured transmission coefficient is up to 9%,and after correction,the relative deviation can be less than 1%,which verifies the feasibility and accuracy of self-calibration of transmission coefficient.In addition,the applications of the transmission system in the transmission test of pulse waveform with rise time 380 ps and the cable coupling current test under electromagnetic pulse irradiation are introduced.The measurement results show that the transmission system has good signal fidelity and anti-interference performance,and can be widely used in the fields of high-energy physics experiment,electromagnetic environment effect experiment and so on.

关 键 词：光纤传输系统 宽带模拟信号 传输系数 自校准 幅度调制 

分 类 号：TN929[电子电信—通信与信息系统] TL99[电子电信—信息与通信工程]