| 摘要 |
PURPOSE:To allow rapid connection of optical fibers with high accuracy by forming a groove for removing an adhesive agent to a glass capillary tube of high accuracy at the depth of <1/2 the inside diameter. CONSTITUTION:Since the capillary tube 1 is precisely formed to the inside diameter slightly larger than the outside diameter of the clad part of the optical fibers 3, 4, the concentrical butting and connecting of the optical fibers 3, 4 in the capillary tube 1 are possible by inserting the fibers 3, 4 into the tube 1 from both sides. The groove 1c and gap G for removing the adhesive agent are formed to the central part of the tube 1 and, therefore, the residual air in the tube 1 escapes and the insertion of the adhesive agent 6 and the fibers 3, 4 are facilitated. Since the groove/c is formed to the depth of <1/2 the inside diameter of the capillary tube 1, the end of the optical fibers can be enclosed on the inside diameter surface of the tube 1 at least over half the circumference and the concentrical butting and connecting of the fibers 3, 4 while the connecting ends are held parallel with each other are executed. The reliability and accuracy of the connection are improved in this way. |
