The Use of Fiber Bragg Grating as a Sensor High Accuracy Temperature
Keywords:
Fiber Bragg Grating, optical temperature sensor, Bragg wavelength, thermal sensitivityAbstract
Accurate temperature monitoring is crucial in various sectors, especially in extreme environments where conventional sensors are often unreliable. Fiber Bragg Grating (FBG) is an optical sensor technology that offers significant advantages, such as high temperature sensitivity, immunity to electromagnetic interference, compact size, high flexibility, and the ability to integrate into multiplexed systems. This article presents a comprehensive literature review discussing the working principle of FBG as a temperature sensor, its physical and optical characteristics, and the challenges in its implementation. FBG works based on the principle of temperature-dependent Bragg wavelength changes through changes in the refractive index and lattice period in the optical fiber core. Its sensitivity to temperature ranges from 6–13 pm/°C and can be increased through modifications such as the attachment of bimetal. Other advantages include high measurement accuracy and durability against harsh environmental conditions. However, the use of FBG still faces obstacles such as high equipment costs, fabrication complexity, and the need to separate the effects of strain and temperature in the measurement. Based on the analysis results, FBG has excellent prospects as a high-accuracy temperature sensor for industrial and advanced technology applications, provided that further development is carried out in terms of efficiency, system integration, and calibration methods.
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