The invention relates to the technical field of
optical fiber manufacturing, and discloses a
heavy water vapor replacement device, a spectral measurement
system and a method for reducing water peak
absorption loss of a hollow-
core optical fiber. The method for reducing the water peak
absorption loss of the hollow-
core optical fiber is realized by using a
heavy water vapor replacement device, the effectiveness is verified through a spectral measurement
system, the
heavy water vapor replacement device comprises a vapor generation
assembly, a first gas cavity
assembly and a gas extraction
assembly, the gas extraction assembly firstly vacuumizes the interior of a
fiber core, and the vapor generation assembly generates heavy
water vapor; heavy
water vapor is filled in a
fiber core of the hollow-
core optical fiber through the first gas cavity assembly, the heavy
water vapor is prevented from being mixed with gas reserved in the
fiber core, it is guaranteed that the fiber core of the hollow-core
optical fiber is completely filled with the heavy water vapor, an absorption peak is weakened, especially interference to S-band communication is greatly reduced, hydroxyl formed by heavy water molecules has stable chemical properties, and the service life of the hollow-core
optical fiber is prolonged. Secondary adsorption of common water vapor is effectively delayed, and the
transmission performance of the optical fiber is improved.