基于谱特征提取的光信号特性分析  

Analysis of optical signal characteristics based on spectral feature extraction

作　　者：陈印 李翔 张仁永 孙燕斌 CHEN Yin;LI Xiang;ZHANG Renyong;SUN Yanbin(Chongqing Institute Of Engineering,Chongqing 400056,China;Chongqing Endurance Intelligent Technology Co.,LTD,Chongqing 401121,China)

机构地区：[1]重庆工程学院,重庆400056 [2]重庆耐德智联科技有限公司,重庆401121

出　　处：《激光杂志》2025年第2期204-209,共6页Laser Journal

基　　金：重庆市教委科学技术青年研究项目(No.KJQN202101910);国家级大学生创新创业训练计划项目(No.202212608006)。

摘　　要：为深入了解光信号的传输、调制、解调等方面的性能,以提高光通信系统的传输速率、距离以及稳定性,提出基于谱特征提取的光信号特性分析方法。该方法建立由耦合器、反射镜和光纤光栅传感器阵列组成的光信号检测通道,利用该通道获取光信号传输时的光场强度和光交流信号后,对其进行傅里叶变换得到光信号频率谱,再使用线性调频变换和设置窗口方式,从光信号频率谱内检测单频分量,提取到光信号频率谱特征,依据光信号频率谱特征,建立光信号三波耦合方程,求解该方程后得到光信号特性中的抽运光频率、散射光功率等特性。实验结果表明:该方法可有效获取光信号频率谱,并从该频率谱内提取到谱特征,同时还可从不同脉冲宽度情况下分析得到光信号的散射光强频率,应用性较强。In order to deeply understand the performance of optical signal transmission,modulation,demodula-tion,and improve the transmission rate,distance,and stability of optical communication systems,a spectral feature extraction based optical signal characteristic analysis method is proposed.This method establishes an optical signal de-tection channel consisting of a coupler,reflector,and fiber Bragg grating sensor array.After obtaining the optical field intensity and optical communication signal during optical signal transmission through this channel,Fourier transform is performed on it to obtain the frequency spectrum of the optical signal.Then,linear frequency modulation transform and window setting are used to detect single frequency components from the frequency spectrum of the optical signal,ex-tract the frequency spectrum characteristics of the optical signal.Based on the frequency spectrum characteristics of the optical signal,a three wave coupling equation of the optical signal is established.After solving this equation,the pump light frequency,scattered light power,and other characteristics in the optical signal characteristics are obtained.The experimental results show that this method can effectively obtain the frequency spectrum of optical signals,extract spectral features from this frequency spectrum,and analyze the scattered light intensity frequency of optical signals un-der different pulse widths,with strong applicability.

关 键 词：谱特征 光信号 特性分析 脉冲宽度 散射光强频率 单频分量 

分 类 号：TN248[电子电信—物理电子学]