摘要
由长周期光纤光栅的相位匹配条件与光纤纤芯基模LP_(01)和光纤包层模LP_(OP)的模式方程,利用长周期光纤光栅透射谱的谐振峰随温度与外围介质折射率变化而移动的特性,提出了同时测量水的折射率和温度的方法,并分析了其工作原理。对温度与谐振波长的关系进行了计算机仿真。用该方法进行了实验研究,实验结果与理论研究结果基本吻合。
Using the phase matching condition and the mode equations of the core mode LP01 and the cladding mode LP0p, a method for simultaneous measuring the refractive index and temperature of liquid is proposed. This method exploits the characteristics of the resonance peaks of long-period fiber grating varying with the temperature and the refractive index of the ambient media. The operational principle is analyzed. The computer simulation of the relation between the temperature and resonant wavelength is carried out. An experiment is conducted. The theoretical results are compared with that from the experiments, showing that the two results are in accordance with each other.
出处
《光学与光电技术》
2006年第5期52-54,共3页
Optics & Optoelectronic Technology
关键词
模式方程
长周期光纤光栅
谐振波长
热光系数
mode equation
long-period fiber gratings
resonance wavelength
thermo-optic coefficient
