| 摘要 |
PURPOSE:To measure the connection loss of optical fibers, by shaping the part near the juncture of the fibers to be connected to an arc or coil shape, and measuring the connection loss from the ratio in the electric powers of the exit light before and after the connection thereof. CONSTITUTION:Two pieces of optical fibers 8, 9 to be connected are terminated and fibers 10, 11 are drawn out and are shaped to an arc or coil shape having 5-60mm. diameter to form shaped optical fibers 12, 13. The light of a light source 18 is irradiated to the fiber 12, and the light power from an exit end face 14 is measured. The exit end face 14 and the incident end face 15 and connected. The light power from the fiber 13 is measured with the photodetecting element 17 in a dark box 16. The above-mentioned results and the ratio between the light power to the optical fiber which is formed of the optical fiber of the same kind as the optical fibers to be connected and is formed into a coil shape and the light power which leaks to the outside of the optical fibers and is detected with a photodetector 17 are beforehand measured, and the connection loss of the optical fibers is measured. |
