| 摘要 |
A double-clad (DC) polarization-maintaining (PM) optical fiber comprises a core, an inner cladding, an outer cladding, and stress rods. The core has a core refractive index (n core ). The inner cladding is located radially exterior to the core and has an inner cladding refractive index (n 1 ), which is less than n core . The stress rods are located in the inner cladding, and each stress rod has a stress rod refractive index (n 2 ), which is substantially matched to n 1 . The outer cladding is located radially exterior to the inner cladding. The outer cladding has an outer cladding refractive index (n out ), which is less than n 1 . |
