| 摘要 |
PURPOSE:To obtain an optical fiber cable having excellent temp. characteristics by forming at least one of the outermost covering of optical fiber cores and the sheath of the assemblage of the cores of a rubber material. CONSTITUTION:The coverings 2 of optical fiber cores 1 and the sheath 4 of an optical fiber cable are formed of a rubber material. A tension member 3 consists of an FRP or the like. Natural rubber having the Young's modulus which is about 1/100 of the Young's modulus of PE or nylon is used for the covering 2 and the sheath 4, whereby the coefft. of linear expansion of the cable is reduced, and as a result, the stress to be exerted on the cores 1 is kept low when temp. changes and the deterioration in the transmission characteristics is improved to make less. |
