| 摘要 |
PURPOSE:To prepare elliptical core type optical fibers having constant polarized waves easily, by fusing a form adjusting glass member to a base material for the optical fibers having a core and a clad parts having different refractive indexes in the long direction thereof, and drawing the resultant fused fibers under heating while integrating them. CONSTITUTION:Round bar form adjusting members 4 of the same material as a base material 3 are passed along both opposite sides in the long direction on the same diameter of the performed bar-shaped solid base material 3 for optical fibers constituted of a core part 1 and a clad part 2 and fused thereto. Assistant form adjusting glass members 5 of the same material as the form adjusting glass members 4 are passed along interstices 6 on both sides of the base material 3 and the form adjusting glass members 4 and fused thereto the give an assembly 7. The resultant assembly 7 is then fed into a heating furnace from the one end thereof gradually and spun at a given spinning speed while molten integrally under heating to afford the desired elliptical core type optical fibers having constant polarized waves. |
