Weak-Reflection Fiber Bragg Grating Temperature-Sensing Cable

The weak-reflection fiber Bragg grating (FBG) temperature-sensing cable uses a single-mode sensing fiber. By continuously inscribing ultra-low-reflectivity FBGs at equal intervals along the fiber axis and combining this with a dedicated stress-free isolation packaging process, it achieves long-distance, high-precision, continuous distributed temperature monitoring. The product measures temperature based on the characteristic that the FBG center wavelength changes with temperature. It offers advantages such as no power supply requirement, immunity to electromagnetic interference, stable structure, and high measurement accuracy. It can meet the needs of large-scale temperature monitoring at kilometer scale and even up to 10,000-meter scale, and is suitable for temperature monitoring and safety early warning in fields such as electric power, energy, industry, and infrastructure.