Fiber Bragg Grating Sensors: Design, Applications, and Comparison with Other Sensing Technologies.

Area of Science:

• Optoelectronics and Photonics
• Materials Science
• Sensor Technology

Background:

• Fiber Bragg grating (FBG) sensors are increasingly vital for monitoring physical parameters across structural health, aerospace, biochemical, and environmental sectors.
• Their unique properties offer advantages over traditional sensing methods, driving widespread adoption in critical applications.

Purpose of the Study:

• To provide a comprehensive review of Fiber Bragg grating (FBG) sensor technology.
• To analyze FBG sensor operating principles, advantages (high sensitivity, EMI immunity), and challenges (temperature-strain cross-sensitivity, cost).
• To compare FBG sensors with alternative technologies and explore recent innovations and future research directions.

Main Methods:

• Literature review and synthesis of existing research on FBG sensor technology.
• Comparative analysis of FBG sensors against other sensing modalities.
• Identification and discussion of recent advancements in FBG sensor design, packaging, and implementation.

Main Results:

• FBG sensors demonstrate significant potential due to their high sensitivity and immunity to electromagnetic interference.
• Key challenges include temperature-strain cross-sensitivity and the high cost associated with interrogation systems.
• Recent innovations focus on improving packaging, design, and deployment techniques for enhanced performance.

Conclusions:

• FBG sensors are a mature yet evolving technology with broad applicability.
• Addressing challenges like cross-sensitivity and cost is crucial for wider adoption.
• Future research should prioritize enhancing performance, scalability, and long-term reliability of FBG sensing systems.