Bidirectional Fiber Optical Line Protection Switch (BOLP)

SKU: BOLP

The Bidirectional Optical Line Protection Switching System (BOLP) provides automatic restoration of DWDM traffic by utilizing a redundant optical fiber as a backup path. Designed for both cascaded and hub-and-spoke network topologies, the system ensures recovery from a single fiber cut in a ring configuration within less than 10 ms. The system continuously monitors optical power in both forward and reverse transmission paths. When the power level drops below a user-defined threshold, the switch automatically reroutes traffic to the backup fiber. Once normal fiber continuity is restored, the system automatically reverts to its primary operating mode. To prevent false switching events caused by Fresnel reflections—resulting from abrupt refractive index changes during a fiber break—the switching threshold is software-adjustable during system installation. This enables users to fine-tune system sensitivity for stable and reliable operation. The design incorporates two independent line protection switching modules for bidirectional communication. In the event of DC power loss, the switch maintains traffic through the working port only. Additionally, the system includes a built-in laser and detector to continuously monitor the integrity of the spare fiber line and generate alarms if faults are detected. This architecture eliminates the need for inter-module communication, reducing response time and improving overall reliability. The BOLP system supports high DWDM data rates of up to 200 Gbps and offers fast optical switching with selectable speeds ranging from milliseconds down to a few microseconds, minimizing data loss during switching events. Real-time monitoring of both transmit and receive power levels further enhances system performance and fault detection.