![]() Fiber optic attenuators are generally used in single-mode long-haul application. The intensity of the signal is described in decibels (dB) over a specific distance the signal travels. The fiber is densest at the core and becomes rarer towards the edge of the core.12 core MPO / MTP Fiber Optic loopback Attenuator For Fiber Optical Cable / Patch CordĪ fiber optic attenuator, also known as an optical attenuator, is a passive component that is used to reduce the power level of an optical signal by a predetermined factor in fiber optic transmission system. Graded-index fiber: The refractive index of the core varies in a radial manner from the center. Step-index fiber : In these, the refractive index of the core is constant and undergoes an abrupt change at the interface with the cladding. MT – RJ Connector: similar to RJ connector.Straight – Tip (ST) Connector: used for connecting to networking devices.Subscriber Channel (SC) Connector: used in cable TV.The following figure gives a three-dimensional section of a fiber – optic cable.įiber optic cables need to be connected so that there is no leakage of light signals. Fibers are typically bundles together, where each bundle is covered by a protective outer sheath that prevents the fibers from physical damage. It prevents light rays from outside to enter the optical fiber. Outer Coating or Jacket − The outer jacket is a thin plastic sheath or coating that is opaque to light. This enables total internal reflection of light waves in the core, and eventually propagation of light waves within the core. The glass of cladding has a lower refractive index than the core. It is also called the optical waveguide since it is the main channel through which light signals are transmitted.Ĭladding − The core is surrounded by a glass cladding. The diameter of the core of a single mode fiber is 8 – 10 μm while multimode fibers are 50 μm in diameter. It is cylindrical in shape and it made up of a flexible glass of high refractive index. ![]() ![]() A bunch of fiber optic cables is shown in the following diagram −Ī cross section of a fiber optic cable reveals three parts −Ĭore − It is the innermost portion of an optical fiber through which light propagates. Optical fiber cables are transparent, flexible fibers made up of glass or plastic through which light waves can pass. ![]()
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