Li Yujian, Yu Changyuan, Lu Ping
The Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hong Kong 999077, China.
National Engineering Laboratory for Next Generation Internet Access System, School of Optical and Electronic Information, Huazhong University of Science and Technology, Wuhan 430074, China.
Sensors (Basel). 2022 Feb 21;22(4):1666. doi: 10.3390/s22041666.
In this paper, the field distribution and effective refractive index of transmission modes in single-core six-hole optical fiber were researched by modeling and simulation experiments. Based on the simulation results, a new type of sensor for axial strain, curvature, and temperature applications measurement was designed and fabricated. The experimental results showed that the axial strain sensitivities at different dips were -0.97 pm/με and -1.05 pm/με in the range from 0 to 2000 με, and the temperature sensitivities were 35.17 pm/°C and 47.27 pm/°C in the range from 25 to 75 °C. In addition, the proposed sensor also detected the curvature change with sensitivities of 7.36 dB/m and 20.08 dB/m from -2.582 m to -1.826 m, respectively. Finally, through theoretical analysis, it can be deduced that this has potential application in the field of simultaneous measurement of strain and temperature.
本文通过建模和仿真实验研究了单芯六孔光纤中传输模式的场分布和有效折射率。基于仿真结果，设计并制作了一种新型的用于轴向应变、曲率和温度应用测量的传感器。实验结果表明，在0至2000με范围内，不同凹陷处的轴向应变灵敏度分别为-0.97 pm/με和-1.05 pm/με，在25至75°C范围内，温度灵敏度分别为35.17 pm/°C和47.27 pm/°C。此外，所提出的传感器还检测到了曲率变化，在-2.582 m至-1.826 m范围内，灵敏度分别为7.36 dB/m和20.08 dB/m。最后，通过理论分析可以推断，这在应变和温度同时测量领域具有潜在应用。
