基于偏振混沌环形激光器的光纤分布传感系统  

Study of the fiber distributed sensing system based on a polarization chaos ring laser

作　　者：方捻[1,2] 单超[1,2] 王陆唐[1,2] 黄肇明[1,2] 

机构地区：[1]上海大学特种光纤与光接入网省部共建重点实验室,上海200072 [2]上海大学通信与信息工程学院,上海200072

出　　处：《光电子．激光》2010年第3期335-339,共5页Journal of Optoelectronics·Laser

基　　金：国家自然科学基金资助项目(60577042);上海市重点学科和科委重点实验室资助项目(S30108;08DZ2231100)

摘　　要：以混沌对初值的敏感性作传感机理,提出一种基于偏振混沌环形激光器(PCRL)的分布光纤传感系统,并从理论和实验上研究其检测特性。数值计算和初步实验结果表明,利用PCRL输出时域波形的变化可检测引起光纤延迟角改变的应力和振动。为提高观测灵敏度,进而提出一种比直接观察波形更有效的方法,即通过监测相邻环形周期时间内混沌波形的互相关函数峰值来检测偏振混沌分布传感系统是否受到扰动,而且这种检测方法还能对扰动进行定位。初步实验结果表明,PCRL可用于检测引起光纤横向受冲击的分布传感。The distributed fiber sensing system based on a polarization chaos ring laser（PCRL）,which is sensitive to initial conductions,is presented.Its detectable characteristics are studied theoretically and experimentally.Numerical investigation and preliminary experimental results show that the PCRL can be used to detect a stress or vibration acting on the sensing fiber and changing its retardation angle by the change of the temporal output waveforms.Besides,in order to enhance the detecting sensetivity,a more effective detection method than observing the waveforms,which monitors the peak values of cross-correlation function of chaos waveforms in adjacent ring periods,is presented.The method also has the capacity to locate the disturbance.The preliminary experimental results show that PCRL can be used as a distributed sensor for an impact disturbance in the transverse direction of the sensing fiber.

关 键 词：分布光纤传感 偏振混沌 光纤双折射 光纤环形激光器 

分 类 号：TN248[电子电信—物理电子学] TP212.14[自动化与计算机技术—检测技术与自动化装置]