Fabry-Perot interferences between untuned FBGs for ultrasonic measurements and isolation of their effect by Blind Source Separation techniques

The data stored in the dataset are ultrasonic signals recorder by fiber Bragg gratings. These data were produced as part of a measurement campaign conducted at the GéoEND laboratory and at the CEA List. This dataset is linked to an article submitted to the journal *Measurement* and deals with Fabry–Perot interferences that can occur when using Fiber Bragg Gratings (FBG) as ultrasonic wave sensors.