| 摘要 |
PURPOSE:To manufacture precise optical waveguides with the same pattern by shaping clad blocks of dielectrics and optical waveguide blocks with higher refractivity as prescribed, by uniting them by a heat treatment, and drawing the body to a desired diameter and slicing it into chips. CONSTITUTION:For manufacturing Y-sectioned optical waveguides, clad blocks 2a-2c and optical waveguide blocks 3a-3c having higher refractivity are used in combination. They are inserted into a sheathing tube 4 and then melt-stuck in one body by being heated, and the body is heated and drawn to a diameter for an optical waveguide pattern of desired size, thus forming a long-sized base material for an optical waveguide. Then, the base material is sliced to prescribed thickness at right angles to the lengthwise direction to mass-produce chips 7. Each chip 7 has unnecessary parts cut as shown by dotted lines 8 and is shaped by being polished. |
