High-capacity transmission combined fiber cable and optical wireless for self-healing in bridge damage situation

In this study, we propose a sub-system with a long-haul transmission system for bridge emergency. A fiber Bragg grating is inserted into the sub-system to monitor the bridge situation. In addition, we setup an alternative free space optic route to replace the fiber cable route in case the bridge is damaged or collapsed. A 10 Gb/s per channel data rate over 75 km fiber span is used to verify the system performance. In addition, a CATV program was also successfully demonstrated through the proposed hybrid fiber and wireless system.