Research on the application of fiber optic communication device in tunnel communication

Due to the special nature of the environment, tunnel communication places high demands on the power supply and communication of wireless access nodes. Under the traditional mode, energy supply and signal transmission are separated, resulting in complex system deployment and insufficient reliability. The fiber optic energy and signal co transmission device achieves synchronous transmission of energy and signals through optical fibers, providing an innovative solution for tunnel communication. This study systematically analyzed the working principle and structure of the fiber optic energy and signal transmission device, proposed a wireless access node power supply scheme and efficient signal transmission technology based on fiber optic power supply, and explored the key technologies for improving the photoelectric conversion efficiency. Based on actual tunnel scenarios, this study validates the significant advantages of the device in terms of communication stability and energy supply reliability. Finally, the direction of miniaturization, modularity, and multifunctional integration of fiber optic communication technology was discussed, as well as its potential application value in complex networks and underground facilities. Research has shown that this technology can effectively improve the integration and intelligence level of tunnel communication systems, and has broad application prospects.