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Case Study: 16CH DWDM to Realize 4x10G over 460km

Our customer is going to design a long-haul 4x10G OTN network project using single mode fiber beyond 465 km, actually nearly 500 km, as shown in the following figure. Link loss is 0.3 dB on per KM. Site 1, 2 & 6 are AC powered sites. Site 3, 4 & 5 are DC Powered sites. AC and DC power are available on both DC1 & DC 2. The network switches they use include Cisco WS-C4500X-16, Cisco WS-C4500X-32, Huawei S6720-54C-EI-48S-AC, Huawei S5720-56C-EI-48S-AC, Juniper EX4550-32F. Customers' req...
Posted on   July 2, 2018 By FS.COM
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40CH DWDM Mux Insertion Loss Testing

DWDM, which can add great capacity of bandwidth for long haul backbone data center by multiplexing different wavelengths into one fiber, is one of the dominant technology used in various applications. When purchasing a DWDM Mux Demux, one of the vital parameters that need to be considered is the insertion loss. Higher insertion loss means more investment in DWDM network deployment. This post focuses on the insertion loss testing of 40CH DWDM Mux to offer some help for your DWDM Mux Demux purchas...
Posted on   May 2, 2017 By FS.COM
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Passive DWDM vs. Active DWDM

DWDW is short for dense wavelength division multiplexing. It 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. It has revolutionized the transmission of information over long distances. DWDM can be divided into passive DWDM and active DWDM. This article will detail these two DWDM systems. Passive DWDM Passive DWDM systems have no ac...
Posted on   February 22, 2017 By FS.COM
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Single Fiber CWDM MUX and DEMUX Tutorial

In CWDM networks, bidirectional CWDM MUX DEMUX (also called dual fiber CWDM MUX DEMUX) uses the same wavelengths for transmitting and receiving. It is often used in dual way transmission applications. The working principle is easy to understand. A duplex fiber cable links two dual-fiber CWDM MUX DEMUXs supporting the same wavelengths installed on each end of the fiber optic network. The wavelengths of the two fibers are the same, but they are running on the different directions for duplex transm...
Posted on   January 3, 2017 By FS.COM
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Understand Ports On CWDM and DWDM MUX DEMUX

It is quite common to use CWDM or DWDM to increase the existing fiber optic network without adding any fibers. Using WDM MUX/DEMUX is necessary to build a CWDM or DWDM network. Now there are different ports installed on the CWDM and DWDM MUX DEMUXs to add more beneficial to the fiber optic network. This post will offer details about the ports on CWDM and DWDM MUX DEMUX. The Must-Have Ports on CWDM and DWDM MUX/DEMUX The basic function of the CWDM and DWDM MUX DEMUX is combining data rate o...
Posted on   December 20, 2016 By FS.COM
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18 Channel CWDM Mux/Demux for 10G Network

Imagine turning a cottage into a majestic skyscraper without any innovation or construction. This is what Wavelength-Division Multiplexing (WDM) allows with your existing fiber optic network. Without deploying additional optical fiber, WDM network mux multiplexes multiple optical signal on a single optical fiber by using different wavelengths, which greatly relieves fiber exhaustion and extends link capacity. WDM technology comes into two flavors—CWDM and DWDM. In this article, we’re gonna explo...
Posted on   July 20, 2016 By FS.COM
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How to Install Your CWDM MUX DEMUX System?

Coarse wavelength division multiplexing (CWDM) technology is developed to expand the capacity of a fiber optic network without requiring additional fiber. In a CWDM system, CWDM MUX DEMUX (multiplexer/demultiplexer) is the most important component. Usually, a CWDM MUX DEMUX is used to increase the current fiber cable capacity by transmitting multiple wavelengths, typically up to 18 separate signals over one fiber. This article may mainly describe how to install your CWDM MUX DEMUX system. Unless...
Posted on   March 3, 2016 By FS.COM
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Do You Know All These Terminologies of WDM Technology?

As an unprecedented opportunity to dramatically increase the bandwidth capacity, WDM (Wavelength Division Multiplexing) technology is an ideal solution to get more bandwidth and lower cost in nowaday telecommunications networks. By virtue of fame, WDM becomes a household word now. Yet, most of the time, we only know what is “WDM” but do not really know WDM technology. Actually, there are various of terminologies used in WDM that are always a headache for us. Now, let’s see what are they. WDM ...
Posted on   October 27, 2015 By FS.COM
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From O to L: the Evolution of Optical Wavelength Bands

In optical fiber communications system, several transmission bands have been defined and standardized, from the original O-band to the U/XL-band. The E- and U/XL-bands have typically been avoided because they have high transmission loss regions. The E-band represents the water peak region, while the U/XL-band resides at the very end of the transmission window for silica glass. Intercity and metro ring fiber already carry signals on multiple wavelengths to increase bandwidth. Fibers entering...
Posted on   October 12, 2015 By FS.COM