摘要
错位式光纤与干涉仪结构相近,可以用于光纤传感器、高精度测量等领域。本文设计一种由包层和外介质层激发纤芯模式的错位式对接光纤,利用COMSOL对其传输过程进行模拟。在1 500~1 600 nm波段,对输出光强、光纤损耗系数进行数值分析,并结合电场分布图研究其传输特性。确定纤芯折射率为1.69,研究不同包层折射率下外层介质的折射率改变对光纤传输效果的影响。结果表明,当包层折射率为1.456,外层介质折射率为1.45,光纤工作波长为1 570 nm时,输出最大光强可达到9.2 dB,损耗系数为0.31 dB/km,传输效果最佳。
Misplaced optical fibers are similar to interferometer structures,and they can be used in fiber optic sensors,high-precision measurements,and other fields. In this paper,a misplaced docking fiber with core excitation mode by cladding and outer media layers is designed,and its transmission is simulated by COMSOL Multiphysics software. In the 1 500~1 600 nm band,the output light intensity and optical fiber loss coefficient are analyzed numerically,and the transmission characteristics are studied in combination with the electric field distribution map. The refractive index of the core was determined to be 1.69,and the influence of the refractive index change of the outer medium under the different refractive indexes of the cladding layers on the transmission of the optical fiber are studied. The results show that when the refractive index of the cladding is1.456,the refractive index of the outer medium is 1.45,and the operating wavelength of the optical fiber is1 570 nm,the best transmission is achieved with the maximum output light intensity of 9.2 dB and the loss coefficient of 0.31 dB/km.
作者
唐方颖
王茜
梁英爽
TANG Fangying;WANG Qian;LIANG Yingshuang(School of Science,University of Science and Technology Liaoning,Anshan 114051,China)
出处
《辽宁科技大学学报》
CAS
2022年第2期143-147,共5页
Journal of University of Science and Technology Liaoning
基金
国家自然科学基金青年基金(11504152)
辽宁省教育厅项目(2019LNQN04)。
