一种与调制格式无关的带内链路OSNR监测技术  

In-band link OSNR monitoring technique independent of modulation format

作　　者：曾瑛 张珮明 付佳佳 ZENG Ying;ZHANG Peiming;FU Jiajia(Power dispatching control center of Guangdong Power Grid Co.,Ltd.,Guangzhou 510030,China)

机构地区：[1]广东电网有限责任公司电力调度控制中心,广州510030

出　　处：《光通信技术》2021年第7期14-18,共5页Optical Communication Technology

基　　金：中国南方电网科研项目资助。

摘　　要：为了确保光纤通信系统运行的可靠性和稳定性,提出一种与调制格式无关和对色散和偏振不敏感的带内光信噪比(OSNR)监测技术。通过调节宽带可调谐光带通滤波器的中心波长,对链路上的信道光功率进行了采样,得到的光功率测量值作为机器学习算法高斯过程回归(GPR)的输入特征,精确地估计并监测链路上信道的OSNR。实验结果表明:在2~30 dB的OSNR范围内,该技术能够实现准确的OSNR监测,同时对色度色散(CD)、偏振模色散(PMD)和级联滤波效应(CFE)均具有鲁棒性和与调制格式、速率无关的特性。In order to ensure the reliability and stability of optical fiber communication system,an in-band optical signal-to-noise ratio(OSNR)monitoring technique is proposed,which is independent of modulation format and insensitive to dispersion and polarization.By adjusting the center wavelength of the broadband tunable optical bandpass filter,the optical power of the channel on the link is sampled,and the measured optical power is used as the input feature of the machine learning algorithm Gaussian process regression(GPR)to accurately estimate and monitor the OSNR of the channel on the link.The experimental results show that in the OSNR range of 2-30 dB,the technology can achieve accurate OSNR monitoring,and is robust to chromatic dispersion(CD),polarization mode dispersion(PMD)and cascaded filtering effect(CFE),which is independent of modulation format and rate.

关 键 词：光链路性能监测 调制格式无关 机器学习 相干光通信 

分 类 号：TN256[电子电信—物理电子学]