The important parameters that need attention when operating WDM system
Posted on Jun 19, 2017 by cozlink.com
When operating the WDM system, make sure to pay extra attention to the following parameters:1. wavelengthA wavelength is a distance traveled by a wave in a vibration period. The wavelength λm of the monochromatic light propagating in the optical fiber is represented by the following formula:λm = λ / n = v / f where" λ "means the wavelength in the vacuum, " n "refers to the refractive index," v " means the phase velocity, and" c "is calculated by c / n, The propagation speed in vacuum, is 2.99792458 X 108 m/s, "f" refers to the optical frequency.Note: In the practical application of WDM, the wavelength of the communication laser, the wavelength of the optical filter, the wavelength of the transmission channel of the light propagating in the fiber are represented by "λ", and the wavelength in nanometer is usually in the vacuum.2. ChannelIn the WDM system, each input channel has a unique wavelength, so each channel can go through the fiber "parallelly".3. PassbandPassband refers to the fr..
How to Accomplish Higher Speed in Fiber Optic Cable by Multiplexing Technology？
Posted on Apr 01, 2017 by cozlink.com
Nowadays, there are several kinds of multiplexing technology pushing the development of network speed based on fiber optical cabling. They are time division multiplexing(TDM) technology, space division multiplexing (SDM) technology and wavelength division multiplexing(WDM) technology. Time division multiplexing(TDM) technologyTime division multiplexing is a way of transmitting more data by using smaller and smaller time increments and multiplexing the signal with a lower data rate into a higher speed composite signal. By time division multiplexing, lower speed electrical signals are interleaved in time and are transmitted over a faster composite optical path. Thus, the resulting higher data rate will be several times as much as the individual input rate.There are many examples of this. By using this parallel electrical signal, combine in the multiplexer, and transmit serially in the optical fiber to achieve the Ethernet rate. For instance, 10Gbps Ethernet has four channel options,..
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 ..