长周期光纤光栅检测混合油的折射率  

Measurement of the Refractive Index of the Mixed Oil Kerosene Based on Long Period Fiber Grating

作　　者：毕卫红[1] 邢云海 周昆鹏[1,2] 付兴虎[1] 付广伟[1] BI Wei-hong XING Yun-hai ZHOU Kun-peng FU Xing-hu FU Guang-wei(School of Information Science and Engineering, The Key Laboratory for Special Fiber and Fiber Sensor of Heibei Province, Yanshan University, Qinhuangdao , Hebei 066004, China School of Physics and Electronic Information, Inner Mongolia University for Nationalities, Tongliao, Inner Mongolia 028000, China)

机构地区：[1]燕山大学信息科学与工程学院河北省特种光纤与光纤传感重点实验室,河北秦皇岛066004 [2]内蒙古民族大学物理与电子信息学院,内蒙古通辽028000

出　　处：《光子学报》2017年第2期38-44,共7页Acta Photonica Sinica

基　　金：国家自然科学基金(Nos.61475133;61575170);河北省科技计划项目(Nos.14273301D;15273304D;16273301D;16213902D)资助~~

摘　　要：为了检测柴油煤油混合油的折射率特性,利用耦合模理论分析长周期光纤光栅折射率传感特性,建立长周期光纤光栅中心波长、透射谱峰值损耗与混合油品中柴油含量的关系.结果表明:在混合油中,随着柴油含量的增加,长周期光纤光栅波长发生蓝移,当柴油含量达到使混合油折射率等于包层折射率时,中心波长漂移最大,柴油含量每改变1%,中心波长平均漂移0.622 7nm;柴油含量继续增加,混合油折射率大于包层折射率时,光栅中心波长基本保持不变,但是峰值损耗逐渐增大,带宽减小,之后柴油含量每增加1%,峰值损耗线性增加0.154 6dB.该方法在检测混合燃料各组分含量具有潜在的应用前景.In order to detect the characteristics of refractive index of the oil mixed kerosene and diesel, the sensitive features of refractive index of long period fiber grating were analyzed by using the coupled-mode theory, the relationship between the content of diesel oil and the long period fiber grating＇ s resonant wavelength and transmitted intensity was obtained. The result shows that when the diesel oil of the mixed oil increases, the long period fiber grating resonance wavelength blue-shifts. And when the concentration of diesel oil reaches a certain concentration that the refractive index of the solution is equal to the cladding refractive index, the resonance wavelength will shift to the maximum. As the concentration of diesel changes 1%, the average shifts of resonance wavelength reaches 0. 622 7 nm. As the diesel oil increases sequentially, the refractive index of mixed oil exceeds the cladding refractive index, and the resonant wavelength does not change basically, the shape changes greatly with the bandwidth decreasing and the peak loss increasing. And with the concentration of diesel oil increasing unceasingly, the peak loss increase and bandwidth diminishes. As the concentration of diesel changes 1%, the peak loss reaches 0. 154 6 dB. So the long period fiber grating has a potential application prospect in the detection of mixed fuel concentration.

关 键 词：长周期光纤光栅 耦合模 混合油品 柴油含量 折射率 

分 类 号：TN253[电子电信—物理电子学]