In this work, we propose a fibre Bragg grating (FBG)–based quasi-distributed humidity sensor, in which humidity-sensing grating and temperature-compensation grating are integrated on a single optical fibre, enabling simultaneous measurement and effective decoupling of relative. In this work, we propose a fibre Bragg grating (FBG)–based quasi-distributed humidity sensor, in which humidity-sensing grating and temperature-compensation grating are integrated on a single optical fibre, enabling simultaneous measurement and effective decoupling of relative. Fiber Bragg grating (FBG) sensors have emerged as advanced tools for monitoring a wide range of physical parameters in various fields, including structural health, aerospace, biochemical, and environmental applications. This review provides a comprehensive overview of FBG sensor technology. In the vast realm of optical fiber sensing, where precision and innovation converge, Fiber Bragg Gratings (FBGs) stand as luminaries, casting their influence across myriad applications.
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