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An Overview of DWDM Technology and DWDM System Components

Telecommunications makes wide use of optical techniques in which the carrier wave belongs to the classical optical domain. The wave modulation allows transmission of analog or digital signals up to a few gigahertz (GHz) or gigabits per second (Gbps) on a carrier of very high frequency, typically 186 to 196 THz. In fact, the bitrate can be increased further, using several carrier waves that are propagating without significant interaction on a single fiber. It is obvious that each frequency corres...
Posted on April 9, 2015 By FS.COM
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OADM vs. ROADM: What's the Difference?

Over the past few years, the use of wave division multiplexing (WDM) to introduce more bandwidth on a single mode fiber (SMF) becomes very popular. To fulfill the requirement of bandwidth flexibility and operational efficiency, the optical add/drop multiplexer (OADM) was introduced to multiplex and route different channels of light into or out of a single mode fiber. The traditional OADM used the fixed lasers/filters for fixed wavelengths, but now it can not meet the increasing use of bandwidth,...
Posted on September 30, 2014 By FS.COM
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Difference Between SONET/SDH and DWDM

The next generation of SONET (Synchronous Optical Network) or SDH (Synchronous Digital Hierarchy) equipment continues to be well accepted by service providers and is being usefully deployed into networks right now to carry continually increasing network traffic. When compared with traditional SONET, the next generation of DWDM (Dense Wavelength Division Multiplexing) is seen as a simple architecture, scalability, high capacity add/drop, multiple ring terminations, multi-services, and multiple fa...
Posted on May 6, 2014 By FS.COM
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Fiber Optic Transmission Multiplexing Techniques

In fiber optic communication, multiplexing is considered to be the principal means for the expansion of existing fiber network engineering. Since optical data can be carried by employing different physical dimensions, such as time, frequency, space, polarity, etc., different multiplexing techniques are possible to be used in increasing the data carrying capacity of a single optical fiber. At present some multiplexing techniques are already used in the progress of optical innovation, and some app...
Posted on February 18, 2013 By FS.COM
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CWDM vs DWDM: What’s the Difference?

When dealing with OTN (Optical Transport Network), there are two main types of Wavelength Division Multiplexing (WDM) systems: Coarse Wavelength Division Multiplexing (CWDM) and Dense Wavelength Division Multiplexing (DWDM). As two modern WDM technologies, they are both used for increasing the bandwidth of fiber by combining optical signals of different wavelengths on one strand of fiber. But CWDM vs DWDM, what are their differences? WDM, CWDM and DWDM Wiki To better understand the differenc...
Posted on November 28, 2012 By FS.COM