Applications of Fiber Optic Sensors in Sri Lanka

Fiber optic sensors in Sri Lanka are being applied in infrastructure monitoring, smart city development, and biomedical engineering to enhance safety, efficiency, and technological innovation.

Infrastructure Monitoring and Civil Engineering

Fiber optic sensors are increasingly used in structural health monitoring across Sri Lanka. Projects led by the University of Moratuwa, in collaboration with Cambridge and Oxford universities and Access Engineering PLC, are introducing fiber optic monitoring technology to assess the integrity of civil structures . These sensors, often embedded in or attached to infrastructure, can detect strain, temperature changes, and structural stress, enabling real-time monitoring of bridges, multi-storey buildings, and historic structures . This technology is particularly valuable in Sri Lanka due to natural disaster risks such as floods and landslides, allowing predictive maintenance and improved resilience .

Smart City and Urban Applications

In urban centers like Colombo and Kandy, Distributed Acoustic Sensing (DAS) and Distributed Temperature Sensing (DTS) are being integrated into fiber networks to support smart city initiatives . These sensors can monitor traffic, detect vibrations, and enhance security systems. When combined with AI, they enable predictive analytics for infrastructure management, reducing operational costs and improving urban safety.

Telecommunications and Network Enhancements

Fiber optic sensors also play a role in telecommunications, where smart fibers with integrated sensing capabilities help maintain network reliability and performance . Technologies like Space-Division Multiplexing (SDM) and hollow-core fibers are being explored to increase bandwidth and reduce latency, supporting high-speed internet, 5G, and future 6G deployments in Sri Lanka . Bend-insensitive fibers further facilitate rural connectivity, expanding access to broadband in challenging terrains.

Biomedical and Bio-Mechatronics Applications

Fiber optic sensors are applied in bio-mechatronics for healthcare and biomedical engineering . They are used in minimally invasive surgeries, prosthetics monitoring, rehabilitation devices, and soft wearables, providing precise position detection, compliance control, and feedback for medical devices . Fiber Bragg Grating (FBG) sensors are particularly prominent, enabling strain measurement and monitoring of prosthetic devices, with high biocompatibility and versatility for diverse biomedical applications .

Types of Fiber Optic Sensors

• Intrinsic Sensors: The fiber itself acts as the sensing element, detecting changes in light due to strain, temperature, or pressure .
• Extrinsic Sensors: External transducers modulate the light, with the fiber transmitting the signal to a detector .
• Hybrid Sensors: Combine intrinsic and extrinsic elements for enhanced sensitivity and multi-parameter monitoring .

Conclusion

The adoption of fiber optic sensors in Sri Lanka spans civil infrastructure, urban management, telecommunications, and biomedical engineering, offering real-time monitoring, predictive maintenance, and enhanced safety. These applications not only improve operational efficiency but also position Sri Lanka as a leader in smart infrastructure and advanced sensing technologies .