| 摘要 |
PURPOSE:To attain the replacement of new/old cables without interrupting communication by providing a cut part to an optical fiber, using a photodetector to receive an irradiated light from the cut part and providing a bypass circuit. CONSTITUTION:The cut part 11 reaching the buffer layer of an old optical fiber core 10 is provided, a curved pat is formed to a position including the cut part 11 comprised of curving devices A, B and the photodetector 12 of an optical signal generator 14 is opposed to the cut part 11. Thus, a transmission signal is propagated from the cut part 11 to the old optical fiber core 10 at th curved part at the reception side via the optical signal generator 14 and an irradiated optical fiber core 18. Then the optical fiber core 10 of the old line is cut off and the optical fiber core of the new line is connected permanently by molten connection. Then the optical signal generator 14 or the like is removed, the curved part is stretched, the cut part 11 is reinforced by a reinforcement member to complete the replacement. |
