CAJ | 학술논문

基于包层薄膜折射率对微光纤中传输光能量分布的影响，进一步用模场分析仪观察碳纳米管薄膜微光纤在与二甲苯气体接触时，输出光的能量分布和倏逝场的变化。实验结果显示，未镀膜的微光纤暴露在一定浓度的二甲苯气体环境下时，表现出对光很弱的约束能力；而把碳纳米管薄膜微光纤置于与之相同浓度的气体环境时，微光纤的输出光强减小，高阶模的能量发生不稳定的变化，最后待气体挥发完全至浓度稳定后，薄膜微光纤输出光场高阶模能量减小，微光纤的能量分布趋向于高斯分布。
기우포층박막절사솔대미광섬중전수광능량분포적영향，진일보용모장분석의관찰탄납미관박막미광섬재여이갑분기체접촉시，수출광적능량분포화숙서장적변화。실험결과현시，미도막적미광섬폭로재일정농도적이갑분기체배경하시，표현출대광흔약적약속능력；이파탄납미관박막미광섬치우여지상동농도적기체배경시，미광섬적수출광강감소，고계모적능량발생불은정적변화，최후대기체휘발완전지농도은정후，박막미광섬수출광장고계모능량감소，미광섬적능량분포추향우고사분포。
Based on the theoretical indication that the refractive index of the cladding has an impact on the energy distribution of light in microfibers, the changes of the energy distribution and evanescent field in the microfiber coated CNTs films were investigated by mode field analyzer when it is exposed to xylene gas. The experimental results indicate that the uncoated fiber exhibits weak light-binding abilities, further, while in the same gas environment, the intensity of the output light reduces and the energy of higher-order-mode changes unstably for the microfiber coated CNTs films. Finally, when the gas concentration becomes stable, the higher-order-mode energy of the output light field decreases and its energy distribution tends to Gaussian distribution.