| 摘要 |
<p>The invention relates to a Bragg grating fiber hydrophone, including a fluid chamber (2) and an optical fiber (2) in which a Bragg grating (3) is integrated, said optical fiber (2) passing through said fluid chamber (1) along a longitudinal axis (X) and such that the Bragg grating (3) is positioned inside the latter. According to the invention, the fluid chamber (1) is filled with a compressible fluid and is defined by a casing (4) comprising two ends (5a, 5b) connected to the optical fiber (2), and the casing (4) includes at least one portion formed by an extensible and compressible tube (6a, 6b) extending along the longitudinal axis (X). The portion formed by an extensible and compressible tube (6a, 6b) includes an outer end coinciding with one of the two casing ends (5a, 5b) and can be longitudinally deformed by a difference in the pressures applied on the walls thereof, which results in a variation of the length of the optical fiber (2) as measured by a variation in the wavelength of a luminous flux extracted from the optical fiber (2).</p> |
