As known to all, the fiber optic cables are divided into two types: singlemode and multimode, based on a completely different core diameter and mode of transmission. Singlemode fiber optic patch cables are called 9/125. This indicates the glass core is nine microns in diameter. The “125” is the size of the core plus the cladding (125 microns). Singlemode fiber optic patch cables can further be divided into simplex and duplex. This article would put emphasis on singlemode simplex and singlemode duplex fiber patches.
The ends of fiber patch are connected with connector plugs for connection of light circuit activity. If the cable has only one end terminated with connector while the other end ended with fiber, and then it is called pigtail. As we mentioned, the singlemode and multimode are two types of fiber patch cable. The diameter of the singlemode fiber core is 8μm~10μm. Fiber core is rounded with glass cover of lower refractive index than that of the fiber core, keeping the fiber inside the core. Outside the glass coating, it is a layer of thin plastic coating to protect the coating.
Compared to multimode fiber, singlemode fiber has a small loss in the long transmission distance. The potential of singlemode fiber’s bandwidth makes it the only option for high-speed and long-distance data transmission. Simplex and duplex singlemode fiber cables are the further classification of singlemode patch cables. Simplex means this cable is with only one thread of fiber optic glass inside the single core. Duplex fiber cable can be regarded as two simplex cables, either singlemode or multimode, having their jackets conjoined by a strip of jacket material, usually in a zipcord (side-by-side) style. In the following figures and charts, we would give two groups of comparison about OS2 LC to LC fiber cable (singlemode simplex and duplex) according to different polish type (UPC and APC).
Figure1: LC/UPC-LC/UPC singlemode simplex patch cable Vs. LC/UPC-LC/UPC singlemode duplex patch cable
Chart1: LC/UPC-LC/UPC singlemode simplex patch cable Vs. LC/UPC-LC/UPC singlemode duplex patch cable
Figure2: LC/UPC-LC/UPC singlemode simplex patch cable Vs. LC/UPC-LC/UPC singlemode duplex patch cable
Chart2: LC/UPC-LC/UPC singlemode simplex patch cable Vs. LC/UPC-LC/UPC singlemode duplex patch cable
According to the above pictures and charts, we figure out the differences between LC/UPC-LC/UPC singlemode simplex patch cable and LC/UPC-LC/UPC singlemode duplex patch cable, and between LC/UPC-LC/UPC singlemode simplex patch cable and LC/UPC-LC/UPC singlemode duplex patch cable based on the detailed parameter. In the simplex fiber patch, data is only supported in the one direction while the duplex patch allows the data to transmit in two directions.
Therefore, duplex communication is the combination of simplex single communications which requires that both sender and receiver have the independent ability of transmitting and receiving. Singlemode fiber patch cables are the best choice for transmitting data over long distances. They are usually used for connections over large areas, such as college campuses and cable television networks.