Detection of Acoustic Wave Direction Using Weak-Reflection Fiber Bragg Gratings

High precision uwCFBG wavelength calculation method based on correlation coefficient

“…However, as bare uwCFBG arrays bear a resemblance to single mode fibers in terms of shape and exhibit poor mechanical strength and environmental adaptability, it necessitates a secondary coating to prepare uwCFBG cables of diverse structures to cater to the requirements of various engineering applications [11]. Given that the uwCFBG array has no weld points, it can achieve a swift and integrated coating process in the cable preparation [12]. This process is fast, stable, and consistent, but under tension and stress, the center wavelength of the uwCFBG array is susceptible to shifts.…”