Abstract: A method for manufacturing a treated optical fiber for a temperature sensor is provided. The method includes a) obtaining an optical fiber from pure silica or doped by one or more elements from among fluorine and nitrogen, b) imprinting, using a femtosecond laser, at least one Bragg grating in the optical fiber to obtain an imprinted fibe, the Bragg grating extending longitudinally in a portion of the imprinted fiber and being suitable for reflecting light waves propagating along the imprinted optical fiber, the laser having a power greater than or equal to 450 mW, and c) annealing at least the imprinted fiber portion to obtain the treated optical fiber.

Abstract: The invention relates to a gunnery training device using a weapon (1), said device being characterised in that it comprises video capturing means (5) for capturing the field of vision, angular capturing means for detecting angles defining the position of insertion of the synthesis images, processing means (21, 22) for inserting, in real-time, synthesis images into the captured field of vision, and means for visualising (6) the captured field of vision containing said at least one inserted synthesis image.