Single mode optical fiber

摘要

An optical transmission fiber includes a central core having an index difference Deltan1 with an outer optical cladding; a first inner cladding having an index difference Deltan2 with the outer cladding; and a second buried inner cladding having an index difference Deltan3 with the outer cladding of less than -3.10-3. The second buried inner cladding moreover contains Germanium in a weight concentration of between 0.5% and 7%. The fiber shows reduced bending and microbending losses whilst exhibiting the optical performances of a standard single-mode fiber (SSMF).