| 摘要 |
PROBLEM TO BE SOLVED: To provide an optical fiber with a high stimulated Brillouin scattering threshold.SOLUTION: An optical fiber comprises a core having a refractive index profile and a centerline; and a cladding layer surrounding and directly adjacent to the core; where the core contains a dopant material increasing the refractive index in at least one region of the core, such that either: (a) the average longitudinal acoustic wave velocity in the core is within 0.05% of the longitudinal acoustic wave velocity in the cladding layer; or (b) the longitudinal acoustic wave velocity in the core changes by at least 0.2%. |
