The role of small-diameter fiber gratings
Researchers have gained enormous attention in the field of fiber Bragg grating (FBG)-based sensing due to its inherent advantages, such as small size, fast response, distributed sensing, and immunity to the electromagnetic field. The journey begins with the fundamental understanding of Fiber Bragg Gratings—a triumph of ingenuity where periodic variations in the refractive index within an optical fiber create a unique spectral pattern [2, 3]. This invention is a small diameter single-mode optical fiber that has optical gratings formed directly within its core through an intact, protective coating. Optical fiber grating technology serves as a foundational stone in modern communication and sensing systems.
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