subject: Singlemode fiber optic cables 9/125 sm duplex [print this page] Singlemode fiber optic cables 9/125 sm duplex
in fiber optic communication, a singlemode optical fiber cable is designed to carry only a single ray of light. Singlemode fiber also known as, SMF, monomode optical fiber and unimode fiber are better at retaining the fidelity of each light pulse over longer distances than multi-mode fibers.
In fiber optic communication, a singlemode optical fiber cable is designed to carry only a single ray of light. Singlemode fiber also known as, SMF, monomode optical fiber and unimode fiber are better at retaining the fidelity of each light pulse over longer distances than multi-mode fibers.
Angled polished physical contact (APC) is best for high bandwidth applications and long haul links since it offers the lowest return loss (RL) characteristics of connectors currently available . Ultra polished physical contact (UPC) can be prepaired on the field with proper training and has characteristics that are acceptable for intraplant serial digital video or data transmissions.
Optical fiber connectors are used to join optical fibers where a connect/disconnect capability is required. The basic connector unit is a connector assembly. A connector assembly consists of an adapter and two connector plugs. Due to the sophisticated polishing and tuning procedures that may be incorporated into optical connector manufacturing, connectors are generally assembled onto optical fiber in a supplier's manufacturing facility. However, the assembly and polishing operations involved can be performed in the field, for example to make cross-connect jumpers to size.
Optical fiber connectors are used in telephone company central offices, at installations on customer premises, and in outside plant applications. Their uses include: - Making the connection between equipment and the telephone plant in the central office - Connecting fibers to remote and outside plant electronics such as Optical Network Units (ONUs) and Digital Loop Carrier (DLC) systems - Optical cross connects in the central office - Patching panels in the outside plant to provide architectural flexibility and to interconnect fibers belonging to different service providers - Connecting couplers, splitters, and Wavelength Division Multiplexers (WDMs) to optical fibers - Connecting optical test equipment to fibers for testing and maintenance.
Outside plant applications may involve locating connectors underground in subsurface enclosures that may be subject to flooding, on outdoor walls, or on utility poles. The closures that enclose them may be hermetic, or may be "free-breathing." Hermetic closures will prevent subjection of the connectors within to temperature swings unless they are breached. Free-breathing enclosures will subject them to temperature and humidity swings, and possibly to condensation and biological action from airborne bacteria, insects, etc. Connectors in the underground plant may be subjected to groundwater immersion if the closures containing them are breached or improperly assembled.
