长周期光纤光栅拐点对外界折射率的敏感性  

Sensitivity Characteristics of Long-period Fiber Grating which Have Turning Point as a Function of External Refractive Index

作　　者：李洪刚[1] 李恩荣[1] 盛秋琴[1] 

机构地区：[1]南开大学物理科学学院,天津300071

出　　处：《南开大学学报（自然科学版）》2007年第5期68-71,共4页Acta Scientiarum Naturalium Universitatis Nankaiensis

摘　　要：应用耦合模理论,研究了长周期光纤光栅拐点传感对外界折射率的敏感性,包括耦合波长、耦合系数以及透射谱随外界折射率变化的情况.On the base of the theory of the cladding mode, the sensitivity characteristics of long-period fiber grating which have turning point as a function of external refractive index was researched, including the change of resonance wavelength and coupling coefficients and trans- mission spectrum with the change of external refractive index. The result has a theoretics guidance to exploit long-period fiber grating highly sensitive sensor.

关 键 词：长周期光纤光栅 拐点 外界折射率 

分 类 号：O435.1[机械工程—光学工程]