Abstract: A coiled fiber optic cable comprises an optical fiber of glass or plastic that is disposed loosely within a buffer tube. The buffer tube in turn is surrounded with a plastic strength member that is then jacketed in a thermoplastic cover. The assembled cable is wound on a mandrel in a closed helix and is heated to set the helical shape in the plastic member. After cooling, the spiral may be reverse wound to set the coiled configuration. The optical fiber may be single-mode or multimode and it may be graded-index clad or step-index clad. The coiled cable can be terminated to interconnect optical components. If the optical fiber is a single-mode fiber that is not treated to reduce internal reflections when it is bent, then the attenuation of the optical signal will be found to be an inverse function of the extension of the coiled cable.

Abstract: A high frequency coaxial connector adaptor assembly for mating an APC-7 precision connector member to any of a set of coaxial connectors including N type, TNC type, and SMA type connectors. The invention utilizes a first connector body having an APC-7 interface at one end and having an open structure at the other end with an extended center conductor and outer conducting bushing to interface with any one of the set of coaxial connectors which are specially adapted at one end to engage the open structure of the first connector body. This structure permits an integral structure which does not significantly degrade or distort high frequency signals coupled to the coaxial connector while permitting interchangeable coaxial interfaces.