IntroductionWavelength Division Multiplexing (WDM) technology has brought unprecedented bandwidth capacity upgrade, improve bandwidth while also saving costs, as an ideal solution for the modern communication network. WDM has a wide range of terms, to find out is really a headache. Today, we will come to these "WDM terminology".WDMWDM is a kind of technology which combines two or more different wavelengths of optical carrier signals (carrying a variety of information) at the sender by the multiplexer (also known as the multiplexer, multiplexer) together, and coupled to the same optical line Fiber transmission. This is estimated that you are still confused, in fact, this like the principle of the light sunshine the mirror and appears a rainbow , there are a variety of colors of light in a bunch of white light, WDM separated the spectrum of all colors of light, so that they are in the same fiber transmission, the color (wavelength) of the light are carrying different signals, and do not ..
The topology used in WDM systems plays an important role in the utilization of WDM networks. Topology-related terms are:Network topology structureBy using multi-channel on fiber, WDM products make fiber-optic networks more efficient. The network is invisible but can be identified by fiber routing or topology. Sometimes, networked, ring, point to point, point to multipoint and other network topology will use the specific WDM products, therefore, when selecting the WDM products, we must pay great attention to the type of network you use. A network is usually composed of several different sub-network topologies.Ring topology structureThe infrastructure of the urban network is usually a ring topology. A ring topology network is a closed loop consisting of a series of fiber segments whose end points are located in each node in the loop, and each node is connected to only two adjacent nodes through the fiber segment. The ring network is usually a two-fiber bi-directional system. NodeIn ..
What is an optical switch?An optical switch is a device for opening or closing an optical circuit in a communication application that selectively switches the signal in an optical fiber or integrated optical circuit (IOC) from one circuit to another. In the network system, the optical switch plays an important role in protecting the path. It can turn on or off the optical path (in a position for a long period of time, the key features must be able to operate reliably), complete system monitoring and diagnosis. Typically, an optical switch has one or more input ports and two or more output ports.Optical switching technologyAs an important basis for all-optical communication network technology, the development and application of optical switching technology will greatly affect the future development trend of the optical communication network. Therefore, to understand the working principle of optical switching technology is very necessary for future research. As we all know, optical signa..
Definition:Coarse wavelength division multiplexing (CWDM) is a method of combining multiple signals on laser beams at various wavelengths for transmission along fiber optic cables, such that the number of channels is fewer than in dense wavelength division multiplexing (DWDM) but more than in standard wavelength division multiplexing (WDM).Dense Wavelength Division Multiplexing (DWDM) is an optical multiplexing technology used to increase bandwidth over existing fiber networks. DWDM works by combining and transmitting multiple signals simultaneously at different wavelengths on the same fiber. The technology creates multiple virtual fibers, thus multiplying the capacity of the physical medium.Difference WDM DWDM CWDMThe IT refers to a medium where information is transmitted via a link. If two locations want to communicate with each other, one link is sufficient. To connect more locations more links are required what if only one link e.g. between two cities is available, but more applica..