| 摘要 |
PURPOSE:To easily obtain the anisotropic side-pit type polarized wave maintaining optical fiber by inserting a shaped side pit material into a quartz pipe in the base material stage, and collapsing the assembly to obtain a preform. CONSTITUTION:The side pit material 2 is concentrically formed on the periphery of a core 1. Both side surfaces of the columnar member are flatly cut to obtain a plate wherein the side pit material 2 is arranged symmetrically to the core 1. The member is then inserted into the quartz pipe 4, and a semicolumnar quartz rod 3 is inserted between the inner periphery of the pipe 4 and the member. The assembly is collapsed, and integrated to obtain a preform. As a result, a side pit-type polarized wave maintaining optical fiber, wherein the side pit having a lower refractive index than a clad is arranged symmetrically to the core, is obtained. |
