Tag Archives: CWDM Mux/Demux

Guide to CWDM MUX/DEMUX System Installation

CWDM (coarse wavelength division multiplexing) comes from the WDM system. It is designed to increase the capacity of a fiber optic network without adding additional fiber. The wavelengths of CWDM channels are spaced 20 nm apart which allows the use of low-cost, uncooled lasers. The wavelengths usually range from 1270 nm to 1610 nm.

Today, CWDM Mux/Demux (multiplexer/demultiplexer) module is an important device to increase the current fiber cable capacity by transmitting multiple wavelengths with up to 18 signal channels over a single fiber. When using a CWDM multiplexer at the beginning of the network, accordingly a CWDM demultiplexer should be used at the opposite end to separate the wavelengths and direct them into the correct receivers. This greatly reduces the number of fiber cables and other data links.

CWDM-Mux-and-Demux

Basic Components of CWDM MUX/DEMUX System

Several basic components constitute a CWDM Mux/Demux system. They are a local unit, a remote unit, a rack-mount chassis, CWDM Mux/Demux modules, CWDM SFP transceivers and single-mode patch cables. The local unit and remote unit are two different switches. The rack-mount chassis is needed to be installed for holding the CWDM Mux/Demux module. As for the connections, CWDM SFP transceivers are usually used between a CWDM Mux/Demux module and a switch, and single-mode patch cables are used to connect transceivers to the module.

Preparation Before Installation

Multiple single-mode patch cables are needed for CWDM Mux/Demux system connection. And the transceivers used in the system must support the wavelengths from 1270 nm to 1610 nm. Make sure the installation environment is in a dry and interior space. The module should have enough room to create airflow for easier heat distribution. Any inappropriate arrangement that obstructs the ventilation holes should also be avoided.

CWDM MUX/DEMUX System Installation

Step one, mount the system chassis on the rack. The CWDM rack-mount chassis can be mounted in a standard 19-inch cabinet or rack. Make sure that you install the rack-mount chassis in the same rack or an adjacent rack to your system so that you can connect all the cables between your CWDM Mux/Demux modules and the CWDM SFP transceivers.

mounting-system-chassis

Step two, install the CWDM Mux/Demux modules. You should first loose the captive screws on the blank of module panel and remove the panel. Then align the module with the slot of the chassis shelf and gently push the module into the slot. Finally, ensure that you line up the captive screws on the module with the screw holes on the shelf and tighten them up.

installing-CWDM-MuxDemux-modules

Step three, install CWDM SFP transceivers. Since each channel has a specific wavelength, transceivers must comply with the right wavelengths. Each wavelength must not appear more than once in the system. Device pairs must carry transceivers with the same wavelength.

CWDM-SFP-transceiver

Step four, install the CWDM Mux/Demux to the switch. After inserting the CWDM SFP transceiver into the switch, single-mode patch cables are used to connect the transceiver to the CWDM Mux/Demux module.

Step five, connect the CWDM MUX/DEMUX pairs. In a CWDM MUX/DEMUX system, multiplexer and demultiplexer must be installed in pairs. Two strands of single-mode patch cables are needed in the duplex Mux/Demux module, and one strand of single-mode patch cable is enough for the simplex Mux/Demux module.

When you finish all these steps, the installation of CWDM Mux/Demux system is successfully completed.

Conclusion

CWDM Mux/Demux system is definitely a good solution to high capacity data transmission. It is efficient for power, space and cost saving. And the installation procedure is easy to follow. All the components above are available in FS.COM. If you are interested, please come and visit our website for more information.

Effective CWDM & DWDM Mux/Demux Solutions for WDM System

Wavelength division multiplexing (WDM) system is designed for high capacity communications. It is now frequently used as a method to merge multiple optical signals with different wavelengths onto a single fiber. There are two divisions of WDM system: coarse wavelength division multiplexing (CWDM) and dense wavelength division multiplexing (DWDM). Using WDM can enhance the effectiveness of bandwidth in fiber optic communications. The WDM Mux/Demux has a number of communication channels, and matches with a certain frequency. Wavelengths are separated to different receivers at the destination. Mux/Demux module is an important assembly using WDM technology. This article will introduce some effective CWDM and DWDM Mux/Demux solutions for WDM system.

CWDM Mux/Demux & DWDM Mux/Demux
CWDM Mux/Demux

CWDM Mux/Demux is a flexible network solution for WDM optical networks. At most 18 full-duplex wavelengths can be added over a single fiber trunk which greatly alleviates fiber exhaustion. With low insertion loss and high stability, CWDM Mux/Demux is applied to many operations, such as CATV links, WDM systems, test and measurement, metro and access networks, FTTH networks, etc. The deployment of CWDM Mux/Demux is transparent and clear. Its compact form factor enables a much easier manipulation. Only coarse wavelengths can be transmitted over the fiber which reduces the WDM system cost.

Three kinds of CWDM Mux/Demux are widely used in the application. They are 1RU 19″ rack chassis CWDM Mux/Demux, half 19″/1RU CWDM Mux/Demux and splice/pigtailed CWDM Mux/Demux. CWDM Mux/Demux in 19 inch rack mount package is often used for CWDM, EPON and CATV network. Half 19″/1RU CWDM Mux/Demux is packed in LGX box using thing film coating and non-flux metal bonding micro optics packaging. Splice/pigtailed CWDM Mux/Demux is packed in the ABS box package based on standard thin film filter (TFF) technology.

DWDM Mux/Demux

DWDM Mux/Demux conveys optical signals in a more dense wavelength. It is especially used for long distance transmission where wavelengths are highly-packed together. The maximum delivered wavelengths can reach up to 48 channels in 100GHz grid (0.8nm) and 96 channels in 50GHz grid (0.4nm). DWDM Mux/Demux uses a reliable passive WDM technology that achieves low insertion loss. And it provides a solution for adding WDM technology to any existing network device. Applications like point-to-point DWDM fiber optimization, linear add/drop DWDM fiber optimization, external optical monitoring are typically using DWDM Mux/Demux module.

Likewise, 1RU 19″ rack chassis DWDM Mux/Demux, Half 19″/1RU DWDM Mux/Demux and splice/pigtailed DWDM Mux/Demux are three divisions of DWDM Mux/Demux modules. The first type is in 19 inch rack mount package used for long-haul transmission over C-band range of wavelengths. The second one is in LGX package used for PDH, SDH/SONET, Ethernet services transmission. The last one is in ABS box package and its pigtails are labeled with wavelengths.

Effective CWDM Mux/Demux & DWDM Mux/Demux Solutions

18-CH CWDM Mux/Demux is a highly recommended 1RU rack-mount CWDM Mux/Demux that combines 18 CWDM sources on a single fiber. The insertion loss is below 4.9 dB. Moreover, it has a monitor port that enables maintenance without ceasing the operation.

18ch-cwdm-mux-demux

40-CH DWDM Mux/Demux has 40 channels. As a DWDM Mux/Demux module with high density, low-loss and independent 1RU rack mount package, the best utilization of this device is to employ it for high density applications over long-haul transmission. It multiplexes and demultiplexes 40 DWDM wavelengths with 100 GHz in a ring or point-point network. It is a highly cost-effective DWDM Mux/Demux module.

40ch-dwdm-mux-demux

Conclusion

To improve the efficiency of network transmission, WDM technology is often deployed in the devices. 18-CH CWDM Mux/Demux and 40-CH DWDM Mux/Demux are now recommended as the most cost-effective WDM solutions with expanded fiber capabilities. Hope you can choose and use them wisely.