Fig. 2: Simulation of the OCC–BOTDA.
From: Single-shot BOTDA based on an optical chirp chain probe wave for distributed ultrafast measurement
a The distributed BGSs along the fiber for the intrinsic case (black dashed-dotted line), “sawtooth” mode (blue line), and distributed chirp frequency (magenta line). b The distributed BGSs along the fiber for the intrinsic case (black dashed-dotted line), “triangular” mode (blue line), and distributed chirp frequency (magenta line). c The intrinsic BGS (black dashed-dotted line), simulated BGS (blue line), and derivative of the simulated BGS (green line) within the first 2 m
