| 摘要 |
PROBLEM TO BE SOLVED: To enhance the productivity of a light fixing/damping device and to enhance the accuracy of a light damping quantity. SOLUTION: A light fixing/damping device is provided with a metal-doped optical fiber 2 having a core to which a transition metal for absorbing light rays is doped, and a connecting part 3 whose one end is connected to the metal- doped optical fiber 2 and whose other end is connected to the outside; and the core to which the transition metal has been doped has a given damping quantity for unit length, and the damping quality is controlled by setting the length of the optical fiber including this core. The connecting part 3 may be constituted by any of a fused splice part, mechanical splice part, or an optical connector. Further, the device is provided with a replacing part in which the transition metal is doped to the core in the same density, so that a plurality of metal-doped optical fibers having different lengths to each other can be replaced. Since the metal-doped optical fibers are to be prepared in only one kind by changing the lengths thereof, as compared with a conventional constitution in which the density of dope of the transition metal is changed, the productivity can be enhanced, and the accuracy of the length damping quantity can be enhanced. |
