Visualization S1.mp4

A microfiber grating with two FBGs written in two cones of different diameters was selected and placed on the platform to create a 2*2 sensing array. The sensing array labeled 1, 2, 3, and 4. The spectral changes when one point is pressed sequentially, when both points 1 and 3, 2 and 4 are pressed simultaneously, and when all four points are pressed simultaneously. The sensor has high repeatability and real-time responsiveness, and it can precisely detect and discriminate the response of each grating under various pressing postures.