光通信中的直接检测OFDM技术  

Direct detection OFDM technology in optical communication

作　　者：巩玲仙 郭红英 王春灿[2] GONG Lingxian;GUO Hongying;WANG Chuncan(Department of Electronics,Xinzhou Teachers University,Xinzhou 034000,China;Institute of Lightwave Technology,Beijing Jiaotong University,Beijing 100094,China)

机构地区：[1]忻州师范学院电子系,山西忻州034000 [2]北京交通大学光波技术研究所,北京100094

出　　处：《高师理科学刊》2022年第7期41-45,50,共6页Journal of Science of Teachers＇College and University

基　　金：忻州师范学院科研项目(2019KY05);山西省教学改革项目(J2020282)。

摘　　要：基于OptiSystem平台对光通信系统DD-OFDM模型进行了建模与仿真,说明了直接检测OFDM技术的工作原理.研究了在光纤链路中不同距离、不同色散系数的情况下色散对于整个直接检测正交频分复用系统解调的影响.采用色散补偿光纤的色散补偿方式,在300 km传输链路上实现接收端信号质量的优化.分析接收端光的输入输出信噪比对于解调信号质量的影响,发现提高激光器输出功率和传输链路中放大器的增益,可以减少误码,提高接收端信号质量.The optical communication system simulation model of direct detection OFDM(DD-OFDM)is built on the OptiSystem platform,and the principle of DD-OFDM technique is explained.The influence of optical fiber dispersion on DD-OFDM demodulation is analyzed in different distances and different dispersion coefficients.The receiver signal quality is optimized over a 300 km transmission link by using the dispersion compensation fiber.The influence of OSNR on the demodulation signal quality is analyzed,and found that the signal quality can be improved by increasing the output power of the laser and the gain of the amplifier in the transmission link.

关 键 词：DD-OFDM技术 数据中心城域网 多载波技术 色散 

分 类 号：TN256[电子电信—物理电子学]