全内反射型光子晶体光纤横向负荷及扭曲特性研究  

Transverse Load and Torsion Characteristics of Total Internal Reflection Photonic Crystal Fiber

作　　者：杨晓辰[1] 饶云江[1] 朱涛[1] 唐庆涛[1] 

机构地区：[1]重庆大学光电技术及系统教育部重点实验室,重庆400044

出　　处：《光子学报》2008年第2期292-296,共5页Acta Photonica Sinica

基　　金：国家自然科学基金(60537040);教育部重点基金(104210);重庆市自然科学重点基金(8415)资助

摘　　要：用M-Z干涉仪的精确干涉特性来测量光子晶体光纤(Photonic Crystal Fiber,PCF)横向负荷特性及扭曲特性,并应用等效折射率模型对其做了简单的理论分析.实验结果表明:光纤M-Z干涉仪传感臂(即PCF臂)受到外界应力作用时,在固定输入光波长处,PCF的有效折射率n会随外界应力的变化有规律的变化,在横向负荷实验和扭曲实验中表现为干涉条纹的相位与外界应力的变化呈近似线性变化;在横向负荷实验中干涉条纹幅值随所加负载的变化呈近似三角函数变化.Utilizing the exact interferential characteristic of M Z interferometer, the transverse load characteristic and torsion characteristic of Photonic Crystal Fiber （PCF） were generally studied by experiments. The experiment results show that in a definite wavelength, the effective refracting index of PCF presents a regular movement with the change of the transverse load. The phase of interferential stripes made by the M Z interferometer will make an approximately line curve with the change of the load that put on the interferential arm, and the value of the interferential stripes presents a approximately sine curve movement; the phase of interferential stripes make a approximately line curve with the change of torsion angle of the interferential arm. The experiments results are explained by using the equivalent-index model.

关 键 词：光子晶体光纤 光纤M—Z干涉仪 白光干涉 等效折射率模型 横向负荷特性 扭曲特性 

分 类 号：TN253[电子电信—物理电子学]