Effects of strain and temperature changes on the spectra of superstructure fiber gratings

Wang Yongjiao 1; Mi Haokun1; Liang Lei1

doi:10.13756/j.gtxyj.2013.03.021

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Effects of strain and temperature changes on the spectra of superstructure fiber gratings

- Effects of strain and temperature changes on the spectra of superstructure fiber gratings
- Study on Optical communication Issue 3, Pages: 49-50(2013)
- 作者机构：
  
  1. 武汉理工大学光纤传感技术国家工程实验室
  2. 河南城建学院计算机科学与工程系
- 作者简介：
- 基金信息：
- DOI：10.13756/j.gtxyj.2013.03.021
  CLC： TP212.14
- Published：2013，
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[1]王永皎,米浩坤,梁磊.应变和温度变化对超结构光纤光栅光谱的影响[J].光通信研究,2013(03):49-50+63.

Wang Yongjiao 1, Mi Haokun1, Liang Lei1. Effects of strain and temperature changes on the spectra of superstructure fiber gratings. [J]. (3):49-50(2013)
[1]王永皎,米浩坤,梁磊.应变和温度变化对超结构光纤光栅光谱的影响[J].光通信研究,2013(03):49-50+63. DOI： 10.13756/j.gtxyj.2013.03.021.

Wang Yongjiao 1, Mi Haokun1, Liang Lei1. Effects of strain and temperature changes on the spectra of superstructure fiber gratings. [J]. (3):49-50(2013) DOI： 10.13756/j.gtxyj.2013.03.021.

摘要

对由FBG（布拉格光纤光栅）和LPFG（长周期光纤光栅）构成的SFG（超结构光纤光栅）

采用耦合模方程的相似变换解法

研究了应变梯度和温度梯度对SFG的透射谱和反射谱的影响。模拟结果表明

SFG在应变梯度或温度梯度的作用下

其反射光谱和ν阶包层模的透射光谱按确定规则独立漂移

据此可以同时求出光栅所在位置的应变和应变梯度

或温度和温度梯度。

Abstract

For the Superstructure Fiber Grating（SFG） consisting of a Fiber Bragg Grating（FBG） and a Long Period Fiber Grating（LPFG）

a similarity transformation method for the coupled mode equations is presented

and the effects of strain and temperature gradients on the transmission and reflection spectra of SFG are investigated.The simulation results show that by the effects of strain or temperature gradient

its reflection spectrum and transmission spectrum corresponding to ν order cladding mode shift independently according to an established rule.On this ground

it is possible to simultaneously calculate the strain and its gradient

or temperature and its gradient at the location of SFG.

关键词

超结构光纤光栅耦合模理论应变温变

Keywords

superstructure fiber gratingcoupled mode theorystraintemperature change

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