| 摘要 |
PURPOSE:To permit easy joining by inserting low-melting glass into a tube having the inside diameter approximate to the outside diameter of an optical fiber to a prescribed extent then inserting the optical fibers to be joined into said tube and heating the tube to melt the low-melting glass. CONSTITUTION:A prescribed amt. of low-melting glass is inserted into a tube 5 having the inside diameter slightly larger than the outside diameter of optical fibers 3 and 4 and thereafter the fibers 3 and 4 to be joined are inserted into the tube 5 from both ends. The tube 5 is formed of an org. or inorg. material, metal, alloy or the composite thereof. The low-melting glass is formed by adding a m.p. decreasing agent such as lead oxide, lithium oxide, etc. to borosilicate glass of low expansion consisting essentially of silicon oxide, boron oxide, sodium oxide, aluminium oxide, etc. The low-melting glass is melted by a suitable heat source from the outside of the tube 5. The connecting operation is made easy without deterioration in properties and deformation of the optical fibers and without decrease in the passing characteristic of light. |
