四光路磁光调制光纤通信装置设计  

Design of four optical paths magneto-optic modulation optical fiber communication device

作　　者：陈森 王陆君瑜 李相阳 崔雨晨 闫鑫 CHEN Sen;WANG Lujunyu;LI Xiangyang;CUI Yuchen;YAN Xin(Basic Experimental Center for Natural Science,University of Science and Technology Beijing,Beijing 100083,China;School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China)

机构地区：[1]北京科技大学自然科学基础实验中心,北京100083 [2]北京科技大学材料科学与工程学院,北京100083

出　　处：《实验技术与管理》2022年第11期117-120,125,共5页Experimental Technology and Management

基　　金：北京科技大学本科教育教学改革与研究项目(JG2018M52,JG2021Z05,JG2021Z07)。

摘　　要：该文基于法拉第磁光效应,设计了一种四光路磁光调制的光纤通信装置,当线圈电流跳跃变化时传输数字信号,连续变化时传输模拟信号。该装置采用磁光调制,避免了直接调制的色散现象,通过继电器与单片机组合控制电路通断,实现了小电流控制大电流,提高了信号产生过程的安全性和可调性。实验采用四光路法测量椭圆偏振光主偏振方向,实测数据表明光的偏振角度随着流经每个线圈电流的增大而增大,二者近似呈线性关系,与理论相符合,当流经每个线圈的电流每增加1A,偏振角度平均增加5.3°,角度变化明显,可以通过控制电路的通断传输数字信号(0、1)。Based on Faraday magneto-optical effect, a four optical path magneto-optical modulation optical fiber communication device is designed in this paper. The digital signal is transmitted when the coil current jumps and the analog signal is transmitted when the coil current changes continuously. The device adopts magneto-optical modulation to avoid the dispersion phenomenon of direct modulation. Through the combination of relay and single chip microcomputer to control the on-off of the circuit, the small current is used to control the large current, which improves the safety and adjustability of the signal generation process. The four optical path method is used to measure the main polarization direction of elliptical polarized light in the experiment. The measured data shows that the polarization angle of light increases with the increase of the current flowing through each coil, and the relationship between them is approximately linear, which is consistent with the theory. When the current flowing through each coil increases by 1A, the polarization angle increases by 5.3° on average, and the angle change is obvious. Digital signals(0, 1) can be transmitted by controlling the on-off of the circuit.

关 键 词：法拉第效应 偏振 磁光调制 四光路 

分 类 号：O441.2[理学—电磁学]