WDM transceiver means wavelength-division multiplexing transceiver and this is a technology which multiplexes a number of optical carrier signals onto a single optical fiber by using different wavelengths of laser light. This technique enables bidirectional communications over one strand of fiber, as well as multiplication of capacity.The WDM transceiver is commonly applied to an optical carrier (which is typically described by its wavelength), whereas frequency-division multiplexing typically applies to a radio carrier (which is more often described by frequency). Since wavelength and frequency are tied together through a simple directly inverse relationship, in which the product of frequency and wavelength equals c (the propagation speed of light), the two terms actually describe the same concept.A WDM transceiver system uses a multiplexer at the transmitter to join the several signals together, and a demultiplexer at the receiver to split them apart. With the right type of fiber it ..
DefinitionDense Wavelength Division Multiplexing (DWDM) is an associate extension of optical networking. DWDM Technology devices mix the output from many optical transmitters for transmission across one fibre. At the receiving end, other DWDM Technology device separates the combined optical signals and passes every channel to an optical receiver. Just one fibre is employed between DWDM Technology devices rather than requiring one fibre per transmitter and receiver combined. DWDM Technology permits many optical channels to occupy one fiber optic cable. A key advantage to DWDM Technology is that its protocol and bit-rate that it works with as many of the DWDM-based networks will transmit information in science,ATM,SONET,SDH, and LAN. Therefore, DWDM concepts will carry differing kinds of traffic at completely different speeds over the associated optical channel. The dwdm fundamentals are essential to understand the overall scenario of the functions of the system.Significance of DWDM..
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,..