Method for producing an optical fiber coil, optical fiber coil and optical fiber interferometer

A symmetrical-winding optical fiber coil having an axis and comprising an optical fiber, said optical fiber being wound around the coil axis from the middle of the optical fiber, the winding of the optical fiber forming a pattern (Q) comprising a same number N of layers of each half of the optical fiber, where N is a natural integer, each of the layers comprising a set of turns of optical fiber and spaces located between adjacent turns, the turns of a layer coming from a same half of the optical fiber and being placed at a same distance from the coil axis,

• wherein:
• said winding forms a coil having a sectored arrangement comprising both a regular stacking area in which the turns of optical fiber of a layer are juxtaposed to the turns of the adjacent layer(s) so as to form at least one continuous sealing surface between two layers of turns, said at least one sealing surface preventing the passage of air and/or of glue between an external surface of the regular stacking area and at least one space located between the turns of the coil in the regular stacking area, as well as an overlap area in which portions of optical fiber linking different turns of a same layer and/or different layers of the winding cross each other, the overlap area comprising at least one continuous path of communication between an external surface of the coil in the overlap area and said spaces located between adjacent turns of the regular stacking area and wherein the coil includes glue distributed in a spatially homogeneous manner in said spaces located between adjacent turns of the regular stacking area of the coil.