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Fiber Bragg gratings have attracted extensive attention and research in the field of fiber optic sensors due to their low cost, ease of processing and improvement, and excellent sensing performance. They have been applied in temperature sensing, gas concentration sensing, bending sensing, and other fields. By means of weak fiber doping, polymer fiber manufacturing, parallel distribution of gratings, and manufacturing of microstructured fiber gratings, functions such as phase shifting, temperature compensation, temperature insensitivity, ultra-high temperature sensing, and bio-absorbable materials can be achieved.
Shen et al. (Mon,) studied this question.
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