一种超长跨距光纤传输链路监测方法  

Monitoring method for ultra-long span optical fiber transmission link

作　　者：邓沌华 张谱 李蔚[2] DENG Zhuanhua;ZHANG Pu;LI Wei(School of Information and Communication Engineering,Hubei University of economics,Wuhan 420205,China;Wuhan National Laboratory for Optoelectronics,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]湖北经济学院信息与通信工程学院,武汉430205 [2]华中科技大学武汉光电国家实验室,武汉430074

出　　处：《光通信技术》2019年第11期29-32,共4页Optical Communication Technology

基　　金：光迅科技有限公司科研开发基金资助;光纤通信与光网络国家重点实验室开放基金资助

摘　　要：为了解决超长跨距光纤传输的损耗测量的问题,提出一种新型基于数字线性调频-光时域反射(DLFM-OTDR)的测量方法,该方法能解决最大测量距离和空间分辨率之间的矛盾。DLFM-OTDR在发射端和接收端分别采用直接调制和直接检测,结构简单,不需要额外的光学器件,并且引入短时分数阶傅里叶变换(STFrFT)进行信号处理和噪声滤波。使用DLFM-OTDR开发板在实际光纤传输链路中进行了实验测试,以光纤链路长度为2×150 km的测量结果为例进行了分析,实验结果表明:DLFM-OTDR特别适合在单跨段很长的情况下,实现超长光纤链路的监测。In order to solve the problem of loss measurement of ultra-long span fiber transmission,this paper proposes a new measurement method based on digital linear frequency modulation optical time domain reflection(DLFM-OTDR).This method can solve the contradiction between the maximum measurement distance and the spatial resolution.The DLFM-OTDR uses direct modulation and direct detection at the transmitter and receiver respectively.The structure is simple and requires no additional optics.The method introduces the short-term fractional Fourier transform(STFrFT)for signal processing and noise filtering.the paper uses the DLFM-OTDR development board to perform experimental tests on the actual fiber transmission links.The measurement results of the fiber link length of 2×150 km are taken as an example,the experimental results show that the DLFM-OTDR is especially suitable for monitoring the ultra-long fiber link under the condition of long single span.

关 键 词：超长跨距光链路 光时域反射仪 数字线性调频 短时分数阶傅里叶变换 

分 类 号：TN256[电子电信—物理电子学]