摘要
光路部分是光纤延迟线信号延迟的主要组成部分,为了降低光学损耗、提高系统性能、精简优化组成结构,提出了一种X波段光纤延迟线光纤分系统的设计方案。首先进行系统整体结构设计,结合光纤的膨胀效应及改进后的马库塞公式,建立了光纤的弯曲半径模型并进行分析计算。然后依据计算结果,针对光纤长度及实际生产精度等对光路部分的主体结构进行了设计与实现、对绕制光纤的传输特性进行了理论分析及计算。最后,将光纤分系统放入系统整体结构中,利用矢量网络分析仪对系统的传输性能进行了测试分析,结果表明,光纤的插入损耗在-38.56 dB到-39 dB之间、幅度平坦度≤±1.5 dB、温度漂移时的增益变化幅度小于±1 dB,系统性能稳定、工作可靠,基本满足光纤延迟线信号传输的指标及误差范围。
The optical path part is the main component of the fiber delay line signal delay.In order to reduce optical loss、improve system performance and optimize composition structure,a design scheme of the optical fiber sub-system for X-band optical fiber delay line is proposed.First,we designed the overall structure of the system.Then,based on the expansion effect of the fiber and the improved Marcuse D formula,we built a bending radius model of the fiber and analyzed it.Then according to the calculation results、fiber length and the actual production accuracy,the main structure of the optical path is designed and realized.And,theoretical analysis and calculation of the fiber transmission characteristics are did.Finally,we put the optical fiber sub-system into overall structure to conduct testing and analysis for transmission performance of the system by using a vector network analyzer.The results show that the insertion loss of the optical fiber is between-38.56 dB to-39 dB,the amplitude flatness≤±1.5 dB,The change in gain during temperature drift is less than±1 dB.Therefore,the system performance is stable and reliable.It basically meet the requirements of signal transmission index and error range for optical fiber delay line.
作者
王翀
磨建业
王景华
杜欢
王璐
WXNG Chong;MO Jian-ye;W\NG Jing-hua;DU Huan;WANG Lu(School of Communication and Information Engineering,Xizan University of Posts and Telecommunications 710121,China)
出处
《光电子．激光》
EI
CAS
CSCD
北大核心
2020年第8期794-799,共6页
Journal of Optoelectronics·Laser
基金
国家自然科学基金项目(61805199)
陕西省自然科学基础研究计划资助项目(2019JQ-863)资助项目。
关键词
光纤延迟线
光纤分系统
弯曲损耗
绕线盘
fiber delay line
optical fiber subsystem
bending loss
wire spool
