Cuba is expanding its fiber optic infrastructure with new submarine cables, creating opportunities for advanced fiber optic sensor applications in communications, structural monitoring, and environmental sensing.

Cuba's Fiber Optic Infrastructure

Cuba has recently enhanced its fiber optic network through the installation of the Arimao submarine cable, connecting Cuba to Martinique, alongside the existing ALBA-1 cable linking Cuba to Venezuela and Jamaica . These developments aim to expand and diversify international Internet capacity, addressing slow and expensive satellite-based connections . While primarily intended for telecommunications, these fiber optic networks provide a foundation for deploying distributed fiber optic sensors (DFOS) for monitoring and early warning systems.

Fiber Optic Sensor Technology

Fiber optic sensors exploit the properties of light to measure parameters such as strain, temperature, and vibration . They are small, lightweight, resistant to high temperatures, and immune to electromagnetic interference, making them suitable for hazardous or remote environments . Distributed sensors can monitor long distances, enabling real-time data collection across infrastructure or environmental sites . Techniques such as Rayleigh, Brillouin, and Raman scattering allow precise detection of changes along the fiber, which can be translated into actionable measurements .

Applications Relevant to Cuba

1. Structural Monitoring: Fiber optic sensors can be embedded in bridges, viaducts, or critical buildings to monitor strain and deformation, ensuring safety and guiding maintenance programs . Distributed systems like SOFO (Surveillance d'Ouvrages par Fibres Optiques) allow continuous monitoring over long spans, which could be applied to Cuba's urban infrastructure .
2. Environmental and Geohazard Monitoring: DFOS can detect landslides, earthquakes, and subsidence, providing early warning and risk mitigation . Given Cuba's susceptibility to hurricanes and seismic activity, integrating fiber optic sensors with the new submarine cables could enhance disaster preparedness.
3. Telecommunications and Internet Quality: Beyond monitoring, fiber optic networks themselves can act as sensing systems, detecting temperature, pressure, or mechanical stress along the cable, which can improve network reliability and maintenance . This is particularly relevant for Cuba, where Internet access is limited and infrastructure resilience is critical.

Potential Benefits

• Real-time monitoring of infrastructure and environmental hazards.
• Enhanced Internet and broadband reliability through integrated sensing.
• Cost-effective maintenance by detecting issues before they escalate.
• Multiplexing capability, allowing multiple sensors along a single fiber, reducing installation complexity .

Conclusion

While Cuba has not yet published specific case studies on fiber optic sensor deployments, the combination of new submarine cables and the versatility of fiber optic sensing technology presents significant opportunities. Applications could range from structural health monitoring to environmental early warning systems, leveraging the same fiber infrastructure that supports telecommunications. Lessons from global DFOS implementations suggest that Cuba could adopt these technologies to improve both infrastructure safety and digital connectivity .