Towards Unified Shape and Biosensing: Multiplexing Tilted and Standard Fiber Bragg Gratings
Abstract: Fiber Bragg Gratings (FBGs) based shape sensing allows for precise, real-time tracking of medical instruments within the body. Standard FBG (SFBG) sensors detect shape changes by analysing the reflected light wavelengths from multiple FBGs along an optical fibre, which respond to strain variations as the fibre bends or twists. Tilted Fiber Bragg Gratings (TFBGs) offer the additional capability of sensing temperature and biologically relevant signals like pH independent of strain in situ.