基于非线性啁啾光栅和波长扫描的ROF系统  

An ROF system with tunable dispersion compensation based on the nonlinear chirped fiber grating and wavelength scanning

作　　者：肖进良 蒲涛[1] 陈大雷[1] 滕义超 任珂[1] 苏国瑞[1] 

机构地区：[1]解放军理工大学通信工程学院,江苏南京210007

出　　处：《光电子．激光》2015年第3期480-486,共7页Journal of Optoelectronics·Laser

基　　金：国家重点基础研究发展计划(973)(2012CB315603)资助项目

摘　　要：为了降低光信号在不同传输距离产生的色散对光载射频(ROF)(光载无线电)传输系统的信号质量的影响,提出了一种基于静态非线性啁啾光纤光栅(NLCFBG)和动态波长扫描相结合的可调谐色散补偿ROF传输系统方案。在对所提出系统方案进行理论分析的基础上制作了NLCFBG,并对ROF传输中的可调谐色散效果进行半实物仿真,分析和比较了有无光栅色散补偿时系统的传输性能;验证了此方案对不同传输距离、不同激光频率以及不同射频载波频率的光纤传输系统色散补偿性能。In order to reduce the influence of dispersion induced by different fiber transmission lengths and then improve the signal quality of radio over fiber（ROF）system,we propose an ROF transmission system based on tunable dispersion compensation,combining the static nonlinear chirped fiber grating and dynamic wavelength scanning.After the theoretical analysis of the proposed system,we actually fabricate a nonlinear chirped fiber grating and make a semi physical simulation of tunable dispersion compensation in ROF transmission with optical communication simulation softwave.Then we compare and analyze the system transmission performance with and without chirped fiber grating dispersion compensation.The simulation results show that under the same conditions,the system effective transmission distance increases from 61 km without grating to 122.5km with grating.When the subcarrier frequency is 20 GHz and transmission distance is 61 km,the ROF system can be error free transmission with the laser frequency in the range from 1551.3nm to 1551.45 nm.The simulation results prove the tunability of dispersion compensation of the proposed scheme in different transmission distances,different laser frequencies and different radio frequencies.

关 键 词：非线性啁啾光纤光栅(NLCFBG) 色散补偿 误码率(BER) 光载射频(ROF) 

分 类 号：TN929[电子电信—通信与信息系统]