OLP 1:1 Optical Line Protection Module: Millisecond-Level Guardian of Fiber Optic Links

In backbone transmission, data center interconnection, broadcasting, and industrial optical communication networks, the uninterrupted operation of fiber optic links directly determines service continuity and system reliability. XiongHua photoelectric introduces the OLP 1:1 optical line protection module, featuring a mature optical switch architecture, real-time optical power monitoring, and millisecond-level automatic switching capabilities. It provides independent, efficient, and stable physical layer protection for both primary and backup fiber optic links, becoming the “last line of defense” for fiber optic transmission systems.

I. Product Positioning and Core Value

XiongHua photoelectrics’ OLP 1:1 optical protection module is a dedicated optical protection unit designed for one primary and one backup fiber optic link. It does not rely on upper-layer protocols and equipment; it achieves real-time monitoring, fault diagnosis, and automatic switching of the primary and backup routes at the pure optical layer. In the event of primary link interruption, degradation, or fiber breakage, it switches to the backup link in milliseconds, ensuring zero service interruption, low packet loss, and rapid recovery.

Compared to 1+1 protection, the 1:1 architecture offers advantages such as lower insertion loss, lower resource consumption, and stronger compatibility. It is widely adaptable to various SDH, WDM, PTN, OTN, and Ethernet transmission systems, meeting the high-reliability requirements of carriers, enterprise private networks, power communications, and rail transit.

II. Working Principle and Architecture Design

The OLP 1:1 module employs a selective transmit/receive protection mechanism:

1. Real-time monitoring of the received optical power of the primary and backup optical fibers, comparing it to user-defined thresholds;

2. When the primary link optical power drops, loses light, or degrades beyond the limit, the module immediately triggers a switchover;

3. An internal high-speed optical switch completes the primary/backup optical path switching, seamlessly transferring services to the backup link;

4. Supports automatic revert/hold mode; after the primary link is repaired, it can automatically recover according to the configuration.

The module integrates high-precision optical detection, high-speed mechanical optical switching, and intelligent control unit into one compact structure with flat insertion loss and reliable switching. It maintains the signal format and transmission rate throughout the entire process, achieving transparent transmission protection.

III. Key Performance and Product Advantages

1. Millisecond-Level Fast Switching: Switching time <20ms, meeting telecom-grade uninterrupted service requirements, with seamless recovery of voice, video, and data services.

2. Low Insertion Loss, High Isolation: Typical insertion loss ≤1.0dB, excellent channel isolation, low crosstalk, and no impact on system link budget and transmission distance.

3. Wide-Range Optical Power Monitoring: Monitoring range covers **-50dBm ~ +25dBm**, thresholds are flexibly configurable, adaptable to various scenarios including long-distance, short-distance, and high-power applications.

4. Stable, Reliable, and Long-Lifespan: Industrial-grade design, switch life ≥10⁸ cycles, wide operating temperature range -40℃~85℃, vibration and interference resistant, suitable for long-term operation in outdoor racks and data centers.

5. Intelligent Management and Easy Integration: Supports management interfaces such as RJ45, RS232, and I2C, enabling remote monitoring, threshold configuration, and status query; standard packaging, compatible with rack-mount and box-type devices, plug and play. 6. Multiple Protection Modes
Supports automatic failover, manual switching, and forced locking; supports configurable backoff/non-backoff modes; maintains protection even after power failure, enhancing operational flexibility.

IV. Typical Application Scenarios

– Telecom Operators: Metropolitan Area Network, Backbone Ring Network, Base Station Backhaul Link Primary/Backup Protection.

– Data Centers: DCI Interconnection, Redundant Backup of Core Switch Uplink Links.

– Power/Energy: Power Communication Private Network, Oil and Gas Pipeline Optical Transmission, Substation Link Protection.

– Broadcasting/Rail Transit: Video Bearer, Signal Transmission, Vehicle/Railwayside Fiber Optic Link Security.

– Government and Enterprise Private Networks: High-Reliability Dedicated Line Protection for Finance, Government Affairs, Healthcare, etc.

V.XiongHua photoelectric  Quality Assurance

XiongHua photoelectric  focuses on the R&D and manufacturing of passive optical devices and optical protection modules, implementing strict quality control throughout the entire process from optical design and device selection to production testing. Each OLP 1:1 optical protection module undergoes high and low temperature aging, optical performance calibration, and reliability verification to provide customers with cost-effective fiber optic link protection solutions through stable performance, rapid delivery, and professional technical support.

Conclusion

Protecting the link at the optical layer, ensuring uninterrupted operation in milliseconds. XiongHua photoelectrics’ OLP 1:1 optical line protection modules, with their robust capabilities of rapid switching, precise monitoring, and stable reliability, build a solid security foundation for fiber optic transmission systems, helping customers achieve zero-interruption, high-availability, and easy-to-maintain modern optical communication networks.