CAJ | 학술논문

提出一种具有独立探头的反射式高双折射光子晶体光纤环镜结构，此结构利用乙醇的热光效应对光子晶体光纤双折射线性调制，双折射的改变引起 Sagnac 干涉系统光程差的变化，并导致光谱强度在某一温度区间随温度线性变化，实现了温度的高灵敏度测量.此结构克服了传统的环内结构易受外界扰动的缺点，并且使其在实际应用中搭建分布式传感系统成为可能.实验验证了乙醇的折射率随温度的线性变化规律，灵敏度为4.45e -4/℃；验证了填充乙醇后光子晶体光纤双折射与温度的变化规律，灵敏度为0.015625/℃；验证了在20～40℃之间，输出光强随温度的变化规律，灵敏度为0.0031 mW/℃.利用琼斯矩阵理论论证了干涉光谱的形成机理，得到干涉谱方程.
제출일충구유독립탐두적반사식고쌍절사광자정체광섬배경결구，차결구이용을순적열광효응대광자정체광섬쌍절사선성조제，쌍절사적개변인기 Sagnac 간섭계통광정차적변화，병도치광보강도재모일온도구간수온도선성변화，실현료온도적고령민도측량.차결구극복료전통적배내결구역수외계우동적결점，병차사기재실제응용중탑건분포식전감계통성위가능.실험험증료을순적절사솔수온도적선성변화규률，령민도위4.45e -4/℃；험증료전충을순후광자정체광섬쌍절사여온도적변화규률，령민도위0.015625/℃；험증료재20～40℃지간，수출광강수온도적변화규률，령민도위0.0031 mW/℃.이용경사구진이론론증료간섭광보적형성궤리，득도간섭보방정.
A high birefringence photonic crystal fiber (HiBi-PCF)loop mirror structure was proposed with a reflective independent probe,in which the thermo-optic effect of ethanol was used to modulate linearly photonic crystal fiber birefringence.The Sagnac interference optical path difference was changed by the birefringence variations,resulting in the linearly changes of spectral intensity in a certain temperature region.Based on the above principle,high sensitive temperature measurement could be implemented.The structure improves the shortcoming of the traditional ring inner structure affected by external disturbance,and makes it possible to build a distributed sensing system in practical application.The experimental results showed that the refractive index of ethanol changes versus the measured temperature linearly with the sensitivity of 4.45e -4 /℃.The birefringence change rule of ethanol-filled HiBi-PCF with temperature was also indicated with the sensitivity of 0.015 625 /℃.In addition,the change rule of output light intensity with temperature between 20 ~40 ℃ was tested with the sensitivity of 0.003 1 mW/℃.The formation mechanism of interference spectrum was demonstrated by using the Jones matrix theory,with the interference spectrum equation obtained.