Experimental research on high temperature environment resistance of optical drop cables

Recently optical loss increases have appeared at high temperatures in some of the optical drop cables, introduced for FTTH field experiments. Optical drop cable is installed from homes to aerial facilities, and consists of an optical. fiber cable part and a self-support ting wire part. Fiber micro-b ending, is caused by cable sheath buckling in high temperature environments when the cable is bent with the cable part inside. Moreover, adhesion betw een the steel reinforcing wires and the cable sheath is effective in preven ting this fiber micro-bending, which induces loss increases. This paper als o shows the most suitable range of adhesive ability in terms of both practi cal construction and environment.