长周期光纤光栅及其在通信传感领域的新应用  

Long period fiber grating and its new applications in communication and sensing

作　　者：何万迅[1] 施文康[1] 叶爱伦[2] 

机构地区：[1]上海交通大学信息检测技术与仪器系,上海200030 [2]上海交通大学光纤技术研究所,上海200030

出　　处：《光学精密工程》2001年第2期104-108,共5页Optics and Precision Engineering

摘　　要：长周期光纤光栅是一种新型光纤器件。介绍了长周期光纤光栅的耦合机理、制备方法以及应用。其耦合机理是前向传输的纤芯基模与前向传输的各阶包层模式之间的耦合。制备原理是对光纤横向曝光 ,使光纤的折射率指数在轴向发生周期性变化。阐明了长周期光纤光栅用于带通滤波、光上下路复用、光纤光源、光纤耦合、偏振器件、新型传感等新技术领域的思路 ,给出了具体实现方法。并通过与其他方案对比 ,说明了基于长周期光纤光栅器件的优点 。WT5BZ]Long period fiber grating(LPFG) is a new kind of optical fiber element. The paper presents its mode coupling mechanism, the fabrication methods as well as its applications. The coupling is between forward propagating core fundamental modes and forward-propagating cladding modes. By transverse exposure, periodical modulation of refractive index is formed along the axis of optical fiber. Ideas about applications of LPFG to band pass filters, optical add/drop multiplexing, optical fiber sources, coupling of fibers, optical fiber polarizers and novel sensing are illustrated. In comparison with other schemes, advantages of the LPFG based devices and an important role of the LPFG in communication and sensing technology are demonstrated in detail.[WT5HZ]

关 键 词：长周期光纤光栅 谐振波长 谐振双峰分离 光纤通信 传感器 

分 类 号：TN929.11[电子电信—通信与信息系统] TP212.14[电子电信—信息与通信工程]