3D printed microfiber waveguide in C-shaped fiber for temperature and air pressure measurement
Abstract
In this study, we propose a microfiber waveguide for temperature and air pressure measurement. To improve mechanical strength of the sensor, a C-shaped fiber is sandwiches between two single mode fibers (SMFs) by fusion splice. The microfiber waveguide is 3D printed between two SMFs to connect two fiber cores by two-photon polymerization technology. Due to multimode property of this printed waveguide, a Mach-Zehnder interferometer (MZI) is obtained. This sensor exhibits a high temperature sensitivity of 361 pm/{\deg}C at 25{\deg}C to 45{\deg}C and a high air pressure sensitivity of 55 pm/kPa from 300hpa to 1000hpa. The MZI sensor features significant advantages such as small size, high stability, and easy fabrication, without the need for complex post-processing, showing great potential and broad application prospects in many sensing applications.
Keywords
Cite
@article{arxiv.2511.09288,
title = {3D printed microfiber waveguide in C-shaped fiber for temperature and air pressure measurement},
author = {Qipeng Huang and Shanmei Zeng and Jingxian Cui and Lin Htein and Hwa-Yaw Tam and Xuehao Hu and Hang Qu},
journal= {arXiv preprint arXiv:2511.09288},
year = {2025}
}