Two-dimensional vector accelerometer based on orthogonal Bragg gratings inscribed in a standard single-mode fiber cladding.

We propose and demonstrate a novel, to the best of our knowledge, two-dimensional vector accelerometer based on orthogonal cladding fiber Bragg gratings (FBGs) inscribed in a standard single-mode fiber (SMF). The cladding FBGs are written by a femtosecond laser point-by-point technique and run parallel with the core. We experimentally demonstrate that the two orthogonal components of acceleration can be directly detected using simplified power-referenced detection. Using this structure, we can simultaneously obtain orientation information and acceleration in a SMF.