摘要
光在光纤中传输产生的时延效应,导致半导体激光器光纤传感信号具有明显的延时特征。该特征不仅会影响信号的实时性,还可能引入额外的误差和干扰。为保证信号传输质量,提出基于LK模型的光纤传感延时反馈信号抑制方法。依据半导体激光器结构非线性动力学的数学表达式,计算信号的光通信、线宽因子以及饱和增益等参数。采用傅里叶变换算法将其约束在标准频谱线上,建立基于光反馈的LK抑制模型,根据信号特征调整抑制解实现光纤传感延时反馈信号抑制。仿真结果表明,所提方法抑制后仅存在1个主特征峰值和1个混沌峰值,抑制效果较好;抑制后信号波长存在明显的周期性,范围在70 nm~370 nm之间;有效改善了光纤传感信号的传输延时。
The delay effect caused by the transmission of light in optical fibers results in significant delay characteristics of semiconduc⁃tor laser fiber sensing signals.This feature not only affects the real⁃time performance of the signal,but may also introduce additional er⁃rors and interference.To ensure the quality of signal transmission,a fiber optic sensing delay feedback signal suppression method based on LK model is proposed.The optical communication,linewidth factor,and saturation gain parameters of the signal are calculated based on the mathematical expression of the nonlinear dynamics of the semiconductor laser structure.Fourier transform algorithm is used to constrain it on the standard spectral line,an LK suppression model is established based on optical feedback,and the suppression solu⁃tion is adjusted according to signal characteristics to achieve delayed feedback signal suppression in fiber optic sensing.The simulation results show that the proposed method only has one main characteristic peak and one chaotic peak after suppression,and the suppression effect is good.After suppression,there is a significant periodicity in the wavelength of the signal,ranging from 70 nm to 370 nm.The transmission delay of fiber optic sensing signals is effectively improved.
作者
刘利飞
许洋洋
李景景
LIU Lifei;XU Yangyang;LI Jingjing(School of Information Engineering,Zhengzhou University of Industrial Technology,Zhengzhou He'nan 451100,China;School of Mechanical and Electrical Engineering,Zhengzhou University of Industrial Technology,Zhengzhou He'nan 451100,China)
出处
《传感技术学报》
北大核心
2025年第12期2200-2205,共6页
Chinese Journal of Sensors and Actuators
基金
河南省科技厅科技攻关支持项目(232102320287,242102220015)
2022年校级一流本科专业建设点项目(郑工教〔2022〕4)。
关键词
光纤传感信号
LK模型
傅里叶变换算法
信号抑制
半导体激光器
振动频率
fiber optic sensing signal
LK model
Fourier transform algorithm
signal suppression
semiconductor laser
vibration frequency
