CAJ | 학술논문

实验研究了侧向挤压作用下的光纤布喇格光栅(FBG)产生的应力双折射现象,提出了一种消除横向应力对温度交叉敏感的简单而又有效的方法,从理论和实验上进行了分析与验证.研究表明,对FBG施加侧向挤压产生的双折射导致普通光纤布喇格光栅存在两个满足布喇格条件的反射光谱,且双峰间距在100 ℃的温度范围内变化了0.055 nm,利用该双峰间距的变化可消除温度传感中横向应力对它的交叉敏感,实现对温敏系数的修正及温度的校正,实验中测得的原始温敏系数是0.013 8 nm/℃,对温敏系数修正了0.005 nm/℃,对变化的温度校正了4 ℃.
실험연구료측향제압작용하적광섬포나격광책(FBG)산생적응력쌍절사현상,제출료일충소제횡향응력대온도교차민감적간단이우유효적방법,종이론화실험상진행료분석여험증.연구표명,대FBG시가측향제압산생적쌍절사도치보통광섬포나격광책존재량개만족포나격조건적반사광보,차쌍봉간거재100 ℃적온도범위내변화료0.055 nm,이용해쌍봉간거적변화가소제온도전감중횡향응력대타적교차민감,실현대온민계수적수정급온도적교정,실험중측득적원시온민계수시0.013 8 nm/℃,대온민계수수정료0.005 nm/℃,대변화적온도교정료4 ℃.
The stress birefringence of fiber Bragg grating(FBG) by the action of the lateral stress has been studied in this paper. A simple effective method of eliminating the lateral stress cross-sensitivity to temperature was proposed, and it was theoretically studied and experimentally proofed. The results showed that the birefringence produced by the lateral stress applied to FBG resulted in two different reflective spectra meeting the Bragg condition in the common fiber Bragg grating and the space between the two reflective peaks has changed 0.055 nm at the range of 100 ℃.The lateral stress cross-sensitivity to temperature can be eliminated by using the change of the space between the two peaks to correct the temperature coefficient and the temperature. The measured temperature sensitivity coefficient was 0.013 8 nm/℃,and the temperature coefficient was corrected by 0.005 nm/℃ and the temperature change was corrected by 4 ℃.