In modern life, bulk fiber optic cable can carry a signal quite a distance — perhaps 60 miles (100km). On a long distance line, there is an equipment hut every 40 to 60 miles. And bulk fiber optic cables are widely used in today’s networking system.
A real fiber optic cable is made out of glass. The glass is incredibly pure so that, even though it is several miles long, light can still make it through. The glass is drawn into a very thin strand, with a thickness comparable to that of a human hair. The glass strand is then coated in two layers of plastic.
Fiber optic cable types can be single mode or multimode. Modes describe the distribution of light energy across the fiber. Light rays can travel through the wire as long as they hit the core-cladding interface at an angle less than that of the critical angle. Multifiber cable is a fiber optic cable with several optical fibers. While single-mode cable is only one fiber with a small core that only allows one mode of light to propagate. Common bulk fiber optic cable types include simplex, duplex, bare fiber, etc.
Simplex Cable – Simplex cables are fiber optic cables with a single optical fiber. Simplex cable varieties include 1.6mm & 3mm jacket sizes.They are used in applications that only require one-way data transfer. Simplex is available in single mode and multimode.
Duplex Cable – Duplex cables are fiber optic cables with two optical fibers in a single cable structure. Light is not coupled between the two fibers, typically one fiber is used to transmit signals in one direction and the other receives. They are usually set up side-by-side and can be used for applications that require simultaneous, bi-directional data transfer. Duplex fiber is available in single mode and multimode.
Bare fiber – Bare fiber refers to a fiber optic core and cladding only. The bare fiber is primarily used for connecting equipment on one end to a light source on the other. Bare fiber can be terminated, polished, or prepared for pig-tailing.
The structure of a 250um coated bare fiber cable:
Core (9um for standard single mode fibers, 50um or 62.5um for multimode fibers),
Coating (soft plastic, 250um is the most popular, sometimes 400um is also used).
Bare unjacketed fibre cable is perfect for effect lighting and can be integrated into any ceiling, wall, bar front and other design applications. Bare fiber cable should only be used in applications where the fiber can be installed without the danger of scratching or damaging the fiber cable and where future protaction is not required.
Jacketed solid core fiber cable is integrally sheathed with PVC to provide mechanical protection. They are suitable for direct embedment in mortar, soil or sand beds as long as care is taken to avoid crushing, scratching, cutting or kinking of the cable.
FiberStore, as a leading provider of optical fiber cables for over 8 years, supplies bare fiber cables from Corning company. The corning optical cable is OFNR-rated, UV-resistant, fully waterblocked indoor/outdoor cables. These cables with water blocking technology eliminates the need for traditional flooding compound, providing more efficient and craft-friendly cable preparation. Available in 62.5µm, 50µm, Single mode, Multimode and hybrid versions.